./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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-bcb38a6-m [2024-06-03 20:18:26,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:18:26,633 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:18:26,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:18:26,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:18:26,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:18:26,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:18:26,674 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:18:26,675 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:18:26,679 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:18:26,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:18:26,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:18:26,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:18:26,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:18:26,682 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:18:26,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:18:26,682 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:18:26,682 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:18:26,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:18:26,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:18:26,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:18:26,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:18:26,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:18:26,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:18:26,685 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:18:26,685 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:18:26,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:18:26,686 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:18:26,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:18:26,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:18:26,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:18:26,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:18:26,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:26,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:18:26,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:18:26,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:18:26,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:18:26,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:18:26,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:18:26,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:18:26,689 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:18:26,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:18:26,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:18:26,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:18:26,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:18:26,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:18:26,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:18:26,908 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:18:26,908 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:18:26,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:18:27,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:18:28,154 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:18:28,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:18:28,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d729e5bd7/40b55d7215f440b7bde3066f2303c96a/FLAG3599af618 [2024-06-03 20:18:28,176 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d729e5bd7/40b55d7215f440b7bde3066f2303c96a [2024-06-03 20:18:28,178 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:18:28,179 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:18:28,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:18:28,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:18:28,385 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:18:28,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:28,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:18:28,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:18:28,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:28" (1/2) ... [2024-06-03 20:18:28,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd71d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:28" (1/2) ... [2024-06-03 20:18:28,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@103dcb6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:28" (2/2) ... [2024-06-03 20:18:28,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd71d52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:28" (2/2) ... [2024-06-03 20:18:28,396 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:18:28,462 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:18:28,463 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-03 20:18:28,463 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-03 20:18:28,463 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0) [2024-06-03 20:18:28,464 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:18:28,464 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-03 20:18:28,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:18:28,843 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:28,862 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:18:28,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:29,044 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:18:29,045 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29 WrapperNode [2024-06-03 20:18:29,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:29,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:29,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:18:29,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:18:29,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,121 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-03 20:18:29,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:29,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:18:29,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:18:29,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:18:29,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,178 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]. [2024-06-03 20:18:29,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,186 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,203 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:18:29,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:18:29,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:18:29,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:18:29,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (1/1) ... [2024-06-03 20:18:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:18:29,256 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) [2024-06-03 20:18:29,311 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 [2024-06-03 20:18:29,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:18:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:18:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:18:29,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:18:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:18:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:18:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:18:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:18:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:18:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:18:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:18:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:18:29,329 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:18:29,460 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:18:29,462 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:18:29,828 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:18:29,829 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:18:30,017 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:18:30,017 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:18:30,018 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:30 BoogieIcfgContainer [2024-06-03 20:18:30,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:18:30,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:18:30,021 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:18:30,023 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:18:30,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:18:28" (1/4) ... [2024-06-03 20:18:30,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b36fd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:18:30, skipping insertion in model container [2024-06-03 20:18:30,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:28" (2/4) ... [2024-06-03 20:18:30,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b36fd12 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:18:30, skipping insertion in model container [2024-06-03 20:18:30,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:29" (3/4) ... [2024-06-03 20:18:30,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b36fd12 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:18:30, skipping insertion in model container [2024-06-03 20:18:30,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:30" (4/4) ... [2024-06-03 20:18:30,026 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:18:30,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:18:30,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:18:30,040 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:18:30,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:18:30,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 20:18:30,150 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 20:18:30,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:30,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:18:30,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 20:18:30,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 20:18:30,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:18:30,172 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;@49591a9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:18:30,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:18:30,176 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:18:30,177 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 20:18:30,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:30,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:30,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:18:30,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:30,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash 828948054, now seen corresponding path program 1 times [2024-06-03 20:18:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:30,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549769169] [2024-06-03 20:18:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:30,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:31,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549769169] [2024-06-03 20:18:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549769169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:31,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:31,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:18:31,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12945694] [2024-06-03 20:18:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:31,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:18:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:18:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:18:31,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 20:18:31,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:31,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:31,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 20:18:31,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:31,742 INFO L124 PetriNetUnfolderBase]: 1602/2411 cut-off events. [2024-06-03 20:18:31,742 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-06-03 20:18:31,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4890 conditions, 2411 events. 1602/2411 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11657 event pairs, 1117 based on Foata normal form. 1/2370 useless extension candidates. Maximal degree in co-relation 4875. Up to 2382 conditions per place. [2024-06-03 20:18:31,758 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 20:18:31,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-03 20:18:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:18:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:18:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-03 20:18:31,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-03 20:18:31,770 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-03 20:18:31,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-03 20:18:31,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:31,776 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 20:18:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 20:18:31,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 20:18:31,781 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 20:18:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:31,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:31,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:18:31,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:31,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2050174005, now seen corresponding path program 1 times [2024-06-03 20:18:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:31,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108734255] [2024-06-03 20:18:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108734255] [2024-06-03 20:18:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108734255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:18:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056663564] [2024-06-03 20:18:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:18:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:18:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:18:32,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 20:18:32,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:32,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 20:18:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:32,784 INFO L124 PetriNetUnfolderBase]: 1590/2393 cut-off events. [2024-06-03 20:18:32,784 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-06-03 20:18:32,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5471 conditions, 2393 events. 1590/2393 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11570 event pairs, 869 based on Foata normal form. 6/2396 useless extension candidates. Maximal degree in co-relation 5456. Up to 2334 conditions per place. [2024-06-03 20:18:32,796 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:18:32,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2024-06-03 20:18:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:18:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:18:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-03 20:18:32,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-06-03 20:18:32,799 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 93 transitions. [2024-06-03 20:18:32,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2024-06-03 20:18:32,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:32,802 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 20:18:32,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 20:18:32,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 20:18:32,803 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 20:18:32,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:32,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:18:32,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1463683409, now seen corresponding path program 1 times [2024-06-03 20:18:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:32,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643571362] [2024-06-03 20:18:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:32,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:33,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:33,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643571362] [2024-06-03 20:18:33,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643571362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:33,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:33,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302555735] [2024-06-03 20:18:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:33,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:33,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:33,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:34,098 INFO L124 PetriNetUnfolderBase]: 1580/2379 cut-off events. [2024-06-03 20:18:34,099 INFO L125 PetriNetUnfolderBase]: For 1257/1257 co-relation queries the response was YES. [2024-06-03 20:18:34,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 2379 events. 1580/2379 cut-off events. For 1257/1257 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11547 event pairs, 980 based on Foata normal form. 4/2380 useless extension candidates. Maximal degree in co-relation 6029. Up to 2332 conditions per place. [2024-06-03 20:18:34,108 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-06-03 20:18:34,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 282 flow [2024-06-03 20:18:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-03 20:18:34,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 20:18:34,110 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 94 transitions. [2024-06-03 20:18:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 282 flow [2024-06-03 20:18:34,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 268 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:34,112 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 168 flow [2024-06-03 20:18:34,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-03 20:18:34,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-03 20:18:34,113 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 168 flow [2024-06-03 20:18:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:34,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:34,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:18:34,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:34,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1706480653, now seen corresponding path program 1 times [2024-06-03 20:18:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905298332] [2024-06-03 20:18:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:34,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905298332] [2024-06-03 20:18:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905298332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:34,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671471580] [2024-06-03 20:18:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:34,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:34,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:34,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 20:18:34,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-03 20:18:34,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:34,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 20:18:34,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:35,353 INFO L124 PetriNetUnfolderBase]: 1571/2364 cut-off events. [2024-06-03 20:18:35,353 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2024-06-03 20:18:35,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 2364 events. 1571/2364 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11468 event pairs, 568 based on Foata normal form. 6/2367 useless extension candidates. Maximal degree in co-relation 6540. Up to 2275 conditions per place. [2024-06-03 20:18:35,363 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-03 20:18:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 388 flow [2024-06-03 20:18:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-03 20:18:35,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-03 20:18:35,366 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 168 flow. Second operand 6 states and 128 transitions. [2024-06-03 20:18:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 388 flow [2024-06-03 20:18:35,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 370 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:35,368 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 209 flow [2024-06-03 20:18:35,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-03 20:18:35,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-03 20:18:35,369 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 209 flow [2024-06-03 20:18:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-06-03 20:18:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:35,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:35,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:18:35,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:35,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -795071456, now seen corresponding path program 1 times [2024-06-03 20:18:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:35,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670010124] [2024-06-03 20:18:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:36,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670010124] [2024-06-03 20:18:36,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670010124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:36,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:36,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:36,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845742544] [2024-06-03 20:18:36,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:36,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:36,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:36,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:36,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:36,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:36,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:36,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:36,592 INFO L124 PetriNetUnfolderBase]: 1593/2407 cut-off events. [2024-06-03 20:18:36,593 INFO L125 PetriNetUnfolderBase]: For 3849/3849 co-relation queries the response was YES. [2024-06-03 20:18:36,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 2407 events. 1593/2407 cut-off events. For 3849/3849 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11797 event pairs, 672 based on Foata normal form. 4/2406 useless extension candidates. Maximal degree in co-relation 7228. Up to 2287 conditions per place. [2024-06-03 20:18:36,604 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-03 20:18:36,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 459 flow [2024-06-03 20:18:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 20:18:36,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 20:18:36,606 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 209 flow. Second operand 6 states and 118 transitions. [2024-06-03 20:18:36,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 459 flow [2024-06-03 20:18:36,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 430 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:36,609 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 262 flow [2024-06-03 20:18:36,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-03 20:18:36,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-03 20:18:36,610 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 262 flow [2024-06-03 20:18:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:36,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:36,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:18:36,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:36,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2133112128, now seen corresponding path program 2 times [2024-06-03 20:18:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:36,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588985987] [2024-06-03 20:18:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:37,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:37,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588985987] [2024-06-03 20:18:37,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588985987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:37,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035037076] [2024-06-03 20:18:37,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:37,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:37,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:37,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:37,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:37,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:37,840 INFO L124 PetriNetUnfolderBase]: 1583/2387 cut-off events. [2024-06-03 20:18:37,840 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2024-06-03 20:18:37,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 2387 events. 1583/2387 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11708 event pairs, 671 based on Foata normal form. 4/2385 useless extension candidates. Maximal degree in co-relation 7724. Up to 2279 conditions per place. [2024-06-03 20:18:37,853 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-03 20:18:37,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 434 flow [2024-06-03 20:18:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 20:18:37,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 20:18:37,856 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 262 flow. Second operand 6 states and 112 transitions. [2024-06-03 20:18:37,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 434 flow [2024-06-03 20:18:37,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 404 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:37,864 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 272 flow [2024-06-03 20:18:37,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-03 20:18:37,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-03 20:18:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 272 flow [2024-06-03 20:18:37,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:37,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:37,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:18:37,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:37,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1674492946, now seen corresponding path program 1 times [2024-06-03 20:18:37,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913810913] [2024-06-03 20:18:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913810913] [2024-06-03 20:18:38,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913810913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:38,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:38,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639160889] [2024-06-03 20:18:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:38,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:38,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:38,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:38,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:38,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:38,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:39,525 INFO L124 PetriNetUnfolderBase]: 1573/2378 cut-off events. [2024-06-03 20:18:39,525 INFO L125 PetriNetUnfolderBase]: For 6575/6575 co-relation queries the response was YES. [2024-06-03 20:18:39,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7827 conditions, 2378 events. 1573/2378 cut-off events. For 6575/6575 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11652 event pairs, 643 based on Foata normal form. 4/2379 useless extension candidates. Maximal degree in co-relation 7803. Up to 2303 conditions per place. [2024-06-03 20:18:39,546 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-03 20:18:39,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 470 flow [2024-06-03 20:18:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 20:18:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 20:18:39,548 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 272 flow. Second operand 6 states and 110 transitions. [2024-06-03 20:18:39,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 470 flow [2024-06-03 20:18:39,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:39,554 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 284 flow [2024-06-03 20:18:39,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-03 20:18:39,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-03 20:18:39,556 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 284 flow [2024-06-03 20:18:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:39,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:39,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:39,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:18:39,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:39,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash -247679903, now seen corresponding path program 1 times [2024-06-03 20:18:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625973348] [2024-06-03 20:18:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:40,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:40,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625973348] [2024-06-03 20:18:40,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625973348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:40,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:40,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:40,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122507036] [2024-06-03 20:18:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:40,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:40,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:40,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:40,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:40,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:40,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:40,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:40,572 INFO L124 PetriNetUnfolderBase]: 1570/2374 cut-off events. [2024-06-03 20:18:40,572 INFO L125 PetriNetUnfolderBase]: For 7824/7824 co-relation queries the response was YES. [2024-06-03 20:18:40,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8279 conditions, 2374 events. 1570/2374 cut-off events. For 7824/7824 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11584 event pairs, 683 based on Foata normal form. 1/2372 useless extension candidates. Maximal degree in co-relation 8255. Up to 2332 conditions per place. [2024-06-03 20:18:40,583 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-03 20:18:40,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 446 flow [2024-06-03 20:18:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 20:18:40,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-03 20:18:40,585 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 284 flow. Second operand 5 states and 88 transitions. [2024-06-03 20:18:40,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 446 flow [2024-06-03 20:18:40,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 414 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:40,591 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 298 flow [2024-06-03 20:18:40,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-03 20:18:40,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-03 20:18:40,593 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 298 flow [2024-06-03 20:18:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:40,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:40,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:18:40,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:40,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash 435779327, now seen corresponding path program 1 times [2024-06-03 20:18:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:40,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708055124] [2024-06-03 20:18:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:41,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708055124] [2024-06-03 20:18:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708055124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:41,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:41,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210638921] [2024-06-03 20:18:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:41,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:41,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:41,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:41,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:41,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:41,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:41,987 INFO L124 PetriNetUnfolderBase]: 1592/2416 cut-off events. [2024-06-03 20:18:41,988 INFO L125 PetriNetUnfolderBase]: For 9701/9701 co-relation queries the response was YES. [2024-06-03 20:18:41,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8829 conditions, 2416 events. 1592/2416 cut-off events. For 9701/9701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11836 event pairs, 670 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 8804. Up to 2319 conditions per place. [2024-06-03 20:18:41,999 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-03 20:18:41,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 554 flow [2024-06-03 20:18:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:18:42,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 20:18:42,001 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 298 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:18:42,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 554 flow [2024-06-03 20:18:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 530 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:42,006 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 340 flow [2024-06-03 20:18:42,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=340, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-03 20:18:42,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 20:18:42,007 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 340 flow [2024-06-03 20:18:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:42,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:42,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:18:42,007 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:42,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 750114705, now seen corresponding path program 2 times [2024-06-03 20:18:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753569823] [2024-06-03 20:18:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753569823] [2024-06-03 20:18:42,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753569823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:42,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832838897] [2024-06-03 20:18:42,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:42,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:42,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:42,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:42,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:42,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:42,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:43,362 INFO L124 PetriNetUnfolderBase]: 1614/2459 cut-off events. [2024-06-03 20:18:43,362 INFO L125 PetriNetUnfolderBase]: For 12274/12274 co-relation queries the response was YES. [2024-06-03 20:18:43,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9561 conditions, 2459 events. 1614/2459 cut-off events. For 12274/12274 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12203 event pairs, 620 based on Foata normal form. 4/2458 useless extension candidates. Maximal degree in co-relation 9535. Up to 2240 conditions per place. [2024-06-03 20:18:43,374 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-03 20:18:43,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 684 flow [2024-06-03 20:18:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:18:43,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-03 20:18:43,375 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 340 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:18:43,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 684 flow [2024-06-03 20:18:43,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:43,381 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 424 flow [2024-06-03 20:18:43,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-03 20:18:43,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-03 20:18:43,382 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 424 flow [2024-06-03 20:18:43,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:43,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:43,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:43,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:18:43,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:43,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash 750121649, now seen corresponding path program 1 times [2024-06-03 20:18:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464242458] [2024-06-03 20:18:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464242458] [2024-06-03 20:18:44,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464242458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:44,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:44,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:44,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688266289] [2024-06-03 20:18:44,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:44,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:44,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:44,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:44,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:44,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:44,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:45,028 INFO L124 PetriNetUnfolderBase]: 1636/2491 cut-off events. [2024-06-03 20:18:45,029 INFO L125 PetriNetUnfolderBase]: For 15660/15660 co-relation queries the response was YES. [2024-06-03 20:18:45,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 2491 events. 1636/2491 cut-off events. For 15660/15660 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12378 event pairs, 594 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 10220. Up to 2287 conditions per place. [2024-06-03 20:18:45,042 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 23 changer transitions 0/104 dead transitions. [2024-06-03 20:18:45,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 784 flow [2024-06-03 20:18:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 20:18:45,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-03 20:18:45,044 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 424 flow. Second operand 7 states and 139 transitions. [2024-06-03 20:18:45,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 784 flow [2024-06-03 20:18:45,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 744 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:45,054 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 496 flow [2024-06-03 20:18:45,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-03 20:18:45,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-03 20:18:45,055 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 496 flow [2024-06-03 20:18:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:45,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:45,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:45,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:18:45,056 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:45,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1498379661, now seen corresponding path program 3 times [2024-06-03 20:18:45,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:45,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465213864] [2024-06-03 20:18:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:45,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465213864] [2024-06-03 20:18:45,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465213864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:45,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:45,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:45,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852035256] [2024-06-03 20:18:45,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:45,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 496 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:45,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:45,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:46,398 INFO L124 PetriNetUnfolderBase]: 1626/2466 cut-off events. [2024-06-03 20:18:46,398 INFO L125 PetriNetUnfolderBase]: For 18268/18268 co-relation queries the response was YES. [2024-06-03 20:18:46,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10712 conditions, 2466 events. 1626/2466 cut-off events. For 18268/18268 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12279 event pairs, 573 based on Foata normal form. 4/2461 useless extension candidates. Maximal degree in co-relation 10683. Up to 2264 conditions per place. [2024-06-03 20:18:46,412 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-03 20:18:46,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 732 flow [2024-06-03 20:18:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:18:46,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 20:18:46,414 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 496 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:18:46,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 732 flow [2024-06-03 20:18:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 682 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:46,426 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 506 flow [2024-06-03 20:18:46,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-03 20:18:46,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-03 20:18:46,427 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 506 flow [2024-06-03 20:18:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:46,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:46,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:46,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:18:46,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:46,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1425282093, now seen corresponding path program 2 times [2024-06-03 20:18:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:46,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255155363] [2024-06-03 20:18:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:46,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255155363] [2024-06-03 20:18:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255155363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353914739] [2024-06-03 20:18:47,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:47,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:47,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:47,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:47,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:47,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:47,988 INFO L124 PetriNetUnfolderBase]: 1648/2513 cut-off events. [2024-06-03 20:18:47,989 INFO L125 PetriNetUnfolderBase]: For 20942/20942 co-relation queries the response was YES. [2024-06-03 20:18:47,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11141 conditions, 2513 events. 1648/2513 cut-off events. For 20942/20942 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12532 event pairs, 583 based on Foata normal form. 4/2511 useless extension candidates. Maximal degree in co-relation 11110. Up to 2292 conditions per place. [2024-06-03 20:18:48,001 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-03 20:18:48,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 842 flow [2024-06-03 20:18:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:18:48,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 20:18:48,002 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 506 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:18:48,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 842 flow [2024-06-03 20:18:48,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 774 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:48,013 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 530 flow [2024-06-03 20:18:48,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-03 20:18:48,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-03 20:18:48,014 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 530 flow [2024-06-03 20:18:48,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:48,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:18:48,015 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:48,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1424985423, now seen corresponding path program 3 times [2024-06-03 20:18:48,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:48,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496543873] [2024-06-03 20:18:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496543873] [2024-06-03 20:18:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496543873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394901931] [2024-06-03 20:18:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:48,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:48,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 530 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:48,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:48,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:48,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:49,536 INFO L124 PetriNetUnfolderBase]: 1638/2494 cut-off events. [2024-06-03 20:18:49,536 INFO L125 PetriNetUnfolderBase]: For 23204/23204 co-relation queries the response was YES. [2024-06-03 20:18:49,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11247 conditions, 2494 events. 1638/2494 cut-off events. For 23204/23204 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12441 event pairs, 588 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 11215. Up to 2284 conditions per place. [2024-06-03 20:18:49,549 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 27 changer transitions 0/99 dead transitions. [2024-06-03 20:18:49,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 772 flow [2024-06-03 20:18:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:18:49,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 20:18:49,551 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 530 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:18:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 772 flow [2024-06-03 20:18:49,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 684 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:49,567 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 504 flow [2024-06-03 20:18:49,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-03 20:18:49,568 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-03 20:18:49,568 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 504 flow [2024-06-03 20:18:49,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:49,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:49,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:18:49,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:49,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1424974511, now seen corresponding path program 1 times [2024-06-03 20:18:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:49,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126037292] [2024-06-03 20:18:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126037292] [2024-06-03 20:18:51,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126037292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:51,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:51,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912876586] [2024-06-03 20:18:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:51,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:51,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:51,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:51,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:51,602 INFO L124 PetriNetUnfolderBase]: 1630/2492 cut-off events. [2024-06-03 20:18:51,602 INFO L125 PetriNetUnfolderBase]: For 25285/25285 co-relation queries the response was YES. [2024-06-03 20:18:51,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2492 events. 1630/2492 cut-off events. For 25285/25285 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12376 event pairs, 592 based on Foata normal form. 4/2493 useless extension candidates. Maximal degree in co-relation 11267. Up to 2369 conditions per place. [2024-06-03 20:18:51,615 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 83 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-03 20:18:51,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 101 transitions, 780 flow [2024-06-03 20:18:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:18:51,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:18:51,618 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 504 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:18:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 101 transitions, 780 flow [2024-06-03 20:18:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 716 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:51,632 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 507 flow [2024-06-03 20:18:51,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-03 20:18:51,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-03 20:18:51,632 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 507 flow [2024-06-03 20:18:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:51,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:51,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:51,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:18:51,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:51,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash 911859405, now seen corresponding path program 1 times [2024-06-03 20:18:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:51,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794394258] [2024-06-03 20:18:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:52,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794394258] [2024-06-03 20:18:52,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794394258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:52,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610519049] [2024-06-03 20:18:52,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:52,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:52,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:52,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:52,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:52,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:52,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:52,614 INFO L124 PetriNetUnfolderBase]: 1657/2531 cut-off events. [2024-06-03 20:18:52,615 INFO L125 PetriNetUnfolderBase]: For 28825/28825 co-relation queries the response was YES. [2024-06-03 20:18:52,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11742 conditions, 2531 events. 1657/2531 cut-off events. For 28825/28825 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12548 event pairs, 656 based on Foata normal form. 3/2528 useless extension candidates. Maximal degree in co-relation 11708. Up to 2409 conditions per place. [2024-06-03 20:18:52,626 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 77 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-03 20:18:52,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 817 flow [2024-06-03 20:18:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:18:52,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:18:52,628 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 507 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:18:52,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 817 flow [2024-06-03 20:18:52,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 768 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:52,644 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 575 flow [2024-06-03 20:18:52,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-03 20:18:52,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-03 20:18:52,645 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 575 flow [2024-06-03 20:18:52,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:52,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:52,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:52,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:18:52,646 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:52,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1455666914, now seen corresponding path program 1 times [2024-06-03 20:18:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519193960] [2024-06-03 20:18:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:53,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:53,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519193960] [2024-06-03 20:18:53,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519193960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:53,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:53,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:53,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59645759] [2024-06-03 20:18:53,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:53,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:53,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:53,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:53,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 575 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:53,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:53,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:53,681 INFO L124 PetriNetUnfolderBase]: 1679/2574 cut-off events. [2024-06-03 20:18:53,681 INFO L125 PetriNetUnfolderBase]: For 32966/32966 co-relation queries the response was YES. [2024-06-03 20:18:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12602 conditions, 2574 events. 1679/2574 cut-off events. For 32966/32966 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12736 event pairs, 655 based on Foata normal form. 2/2573 useless extension candidates. Maximal degree in co-relation 12566. Up to 2467 conditions per place. [2024-06-03 20:18:53,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-03 20:18:53,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 909 flow [2024-06-03 20:18:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:18:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-03 20:18:53,698 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 575 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:18:53,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 909 flow [2024-06-03 20:18:53,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 114 transitions, 870 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:53,723 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 652 flow [2024-06-03 20:18:53,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=652, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-03 20:18:53,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-03 20:18:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 652 flow [2024-06-03 20:18:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:53,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:18:53,724 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:53,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1810476032, now seen corresponding path program 2 times [2024-06-03 20:18:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745857960] [2024-06-03 20:18:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:54,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:54,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745857960] [2024-06-03 20:18:54,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745857960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:54,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:54,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:54,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727931039] [2024-06-03 20:18:54,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:54,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:54,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 652 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:54,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:54,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:54,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:54,864 INFO L124 PetriNetUnfolderBase]: 1689/2590 cut-off events. [2024-06-03 20:18:54,864 INFO L125 PetriNetUnfolderBase]: For 36334/36334 co-relation queries the response was YES. [2024-06-03 20:18:54,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 2590 events. 1689/2590 cut-off events. For 36334/36334 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12809 event pairs, 652 based on Foata normal form. 2/2589 useless extension candidates. Maximal degree in co-relation 12943. Up to 2475 conditions per place. [2024-06-03 20:18:54,877 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 91 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-03 20:18:54,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 113 transitions, 952 flow [2024-06-03 20:18:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:18:54,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:18:54,879 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 652 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:18:54,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 113 transitions, 952 flow [2024-06-03 20:18:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 914 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:54,895 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 700 flow [2024-06-03 20:18:54,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-03 20:18:54,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-03 20:18:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 700 flow [2024-06-03 20:18:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:54,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:54,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:18:54,897 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:54,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1797143552, now seen corresponding path program 3 times [2024-06-03 20:18:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:54,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447842186] [2024-06-03 20:18:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:55,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447842186] [2024-06-03 20:18:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447842186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:55,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:55,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6466610] [2024-06-03 20:18:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:55,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:55,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:55,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:55,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:55,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:55,927 INFO L124 PetriNetUnfolderBase]: 1673/2567 cut-off events. [2024-06-03 20:18:55,927 INFO L125 PetriNetUnfolderBase]: For 39309/39309 co-relation queries the response was YES. [2024-06-03 20:18:55,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13017 conditions, 2567 events. 1673/2567 cut-off events. For 39309/39309 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12703 event pairs, 656 based on Foata normal form. 4/2562 useless extension candidates. Maximal degree in co-relation 12977. Up to 2419 conditions per place. [2024-06-03 20:18:55,943 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 24 changer transitions 0/109 dead transitions. [2024-06-03 20:18:55,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 109 transitions, 946 flow [2024-06-03 20:18:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:18:55,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-03 20:18:55,947 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 700 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:18:55,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 109 transitions, 946 flow [2024-06-03 20:18:55,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 109 transitions, 888 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:55,981 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 698 flow [2024-06-03 20:18:55,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-03 20:18:55,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-03 20:18:55,982 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 698 flow [2024-06-03 20:18:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:55,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:55,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:55,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:18:55,982 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:55,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1803802848, now seen corresponding path program 1 times [2024-06-03 20:18:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:55,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463067069] [2024-06-03 20:18:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:55,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:56,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463067069] [2024-06-03 20:18:56,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463067069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:56,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:56,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424295883] [2024-06-03 20:18:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:56,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:56,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 698 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:56,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:56,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:57,090 INFO L124 PetriNetUnfolderBase]: 1683/2583 cut-off events. [2024-06-03 20:18:57,090 INFO L125 PetriNetUnfolderBase]: For 38420/38420 co-relation queries the response was YES. [2024-06-03 20:18:57,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 2583 events. 1683/2583 cut-off events. For 38420/38420 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12828 event pairs, 631 based on Foata normal form. 2/2581 useless extension candidates. Maximal degree in co-relation 13023. Up to 2475 conditions per place. [2024-06-03 20:18:57,104 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 98 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-03 20:18:57,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 1005 flow [2024-06-03 20:18:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 20:18:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 20:18:57,130 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 698 flow. Second operand 6 states and 106 transitions. [2024-06-03 20:18:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 1005 flow [2024-06-03 20:18:57,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 937 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:57,157 INFO L231 Difference]: Finished difference. Result has 93 places, 104 transitions, 721 flow [2024-06-03 20:18:57,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=93, PETRI_TRANSITIONS=104} [2024-06-03 20:18:57,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-03 20:18:57,158 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 721 flow [2024-06-03 20:18:57,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:57,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:57,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:57,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:18:57,158 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:57,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1797136608, now seen corresponding path program 2 times [2024-06-03 20:18:57,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:57,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911729163] [2024-06-03 20:18:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:57,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:57,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:57,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911729163] [2024-06-03 20:18:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911729163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:57,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:57,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:57,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764243426] [2024-06-03 20:18:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:57,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:57,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:57,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:57,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 104 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:58,244 INFO L124 PetriNetUnfolderBase]: 1685/2578 cut-off events. [2024-06-03 20:18:58,244 INFO L125 PetriNetUnfolderBase]: For 42558/42561 co-relation queries the response was YES. [2024-06-03 20:18:58,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13608 conditions, 2578 events. 1685/2578 cut-off events. For 42558/42561 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12847 event pairs, 639 based on Foata normal form. 2/2576 useless extension candidates. Maximal degree in co-relation 13565. Up to 2465 conditions per place. [2024-06-03 20:18:58,260 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-03 20:18:58,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 1101 flow [2024-06-03 20:18:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:18:58,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-03 20:18:58,262 INFO L175 Difference]: Start difference. First operand has 93 places, 104 transitions, 721 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:18:58,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 1101 flow [2024-06-03 20:18:58,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 122 transitions, 1065 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:58,287 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 811 flow [2024-06-03 20:18:58,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-06-03 20:18:58,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-03 20:18:58,288 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 811 flow [2024-06-03 20:18:58,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:58,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:58,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:18:58,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1797127680, now seen corresponding path program 1 times [2024-06-03 20:18:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:58,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198110292] [2024-06-03 20:18:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198110292] [2024-06-03 20:18:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198110292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:59,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181800312] [2024-06-03 20:18:59,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:59,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:59,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:59,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:18:59,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:59,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:18:59,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:59,659 INFO L124 PetriNetUnfolderBase]: 1731/2651 cut-off events. [2024-06-03 20:18:59,659 INFO L125 PetriNetUnfolderBase]: For 47858/47861 co-relation queries the response was YES. [2024-06-03 20:18:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14367 conditions, 2651 events. 1731/2651 cut-off events. For 47858/47861 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13256 event pairs, 618 based on Foata normal form. 6/2646 useless extension candidates. Maximal degree in co-relation 14322. Up to 2332 conditions per place. [2024-06-03 20:18:59,675 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 42 changer transitions 0/148 dead transitions. [2024-06-03 20:18:59,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1416 flow [2024-06-03 20:18:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:18:59,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:18:59,677 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 811 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:18:59,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1416 flow [2024-06-03 20:18:59,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 148 transitions, 1372 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:59,711 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1086 flow [2024-06-03 20:18:59,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-03 20:18:59,712 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-03 20:18:59,712 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1086 flow [2024-06-03 20:18:59,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:59,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:18:59,713 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:59,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 627125578, now seen corresponding path program 1 times [2024-06-03 20:18:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473719455] [2024-06-03 20:18:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473719455] [2024-06-03 20:19:00,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473719455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:00,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:00,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:00,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382536797] [2024-06-03 20:19:00,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:00,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:00,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:00,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:00,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1086 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:00,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:00,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:00,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:01,218 INFO L124 PetriNetUnfolderBase]: 1815/2775 cut-off events. [2024-06-03 20:19:01,218 INFO L125 PetriNetUnfolderBase]: For 56975/56975 co-relation queries the response was YES. [2024-06-03 20:19:01,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2775 events. 1815/2775 cut-off events. For 56975/56975 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14001 event pairs, 462 based on Foata normal form. 8/2780 useless extension candidates. Maximal degree in co-relation 16234. Up to 2502 conditions per place. [2024-06-03 20:19:01,235 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-03 20:19:01,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 171 transitions, 1682 flow [2024-06-03 20:19:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:19:01,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 20:19:01,236 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1086 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:19:01,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 171 transitions, 1682 flow [2024-06-03 20:19:01,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 171 transitions, 1603 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:01,287 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1140 flow [2024-06-03 20:19:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1140, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2024-06-03 20:19:01,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-03 20:19:01,287 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1140 flow [2024-06-03 20:19:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:01,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:19:01,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash -977967598, now seen corresponding path program 2 times [2024-06-03 20:19:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276719976] [2024-06-03 20:19:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:02,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:02,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276719976] [2024-06-03 20:19:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276719976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:02,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:02,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121125393] [2024-06-03 20:19:02,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:02,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:02,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:02,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:02,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:02,752 INFO L124 PetriNetUnfolderBase]: 1799/2751 cut-off events. [2024-06-03 20:19:02,752 INFO L125 PetriNetUnfolderBase]: For 59199/59199 co-relation queries the response was YES. [2024-06-03 20:19:02,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16280 conditions, 2751 events. 1799/2751 cut-off events. For 59199/59199 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13789 event pairs, 599 based on Foata normal form. 8/2756 useless extension candidates. Maximal degree in co-relation 16229. Up to 2570 conditions per place. [2024-06-03 20:19:02,770 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 19 changer transitions 0/163 dead transitions. [2024-06-03 20:19:02,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 163 transitions, 1552 flow [2024-06-03 20:19:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:19:02,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:19:02,772 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1140 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:19:02,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 163 transitions, 1552 flow [2024-06-03 20:19:02,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 163 transitions, 1464 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:02,827 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1097 flow [2024-06-03 20:19:02,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1097, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-03 20:19:02,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-03 20:19:02,827 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1097 flow [2024-06-03 20:19:02,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:02,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:02,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:02,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:19:02,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:02,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2122823362, now seen corresponding path program 1 times [2024-06-03 20:19:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:02,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509604122] [2024-06-03 20:19:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:02,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:04,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509604122] [2024-06-03 20:19:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509604122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806535716] [2024-06-03 20:19:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:04,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:04,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-03 20:19:04,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:04,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:04,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:04,991 INFO L124 PetriNetUnfolderBase]: 1821/2783 cut-off events. [2024-06-03 20:19:04,991 INFO L125 PetriNetUnfolderBase]: For 62883/62883 co-relation queries the response was YES. [2024-06-03 20:19:05,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16447 conditions, 2783 events. 1821/2783 cut-off events. For 62883/62883 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13975 event pairs, 602 based on Foata normal form. 4/2784 useless extension candidates. Maximal degree in co-relation 16394. Up to 2630 conditions per place. [2024-06-03 20:19:05,010 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 140 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-06-03 20:19:05,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 165 transitions, 1549 flow [2024-06-03 20:19:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:19:05,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:19:05,011 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1097 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:19:05,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 165 transitions, 1549 flow [2024-06-03 20:19:05,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 165 transitions, 1506 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:05,061 INFO L231 Difference]: Finished difference. Result has 115 places, 135 transitions, 1148 flow [2024-06-03 20:19:05,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1148, PETRI_PLACES=115, PETRI_TRANSITIONS=135} [2024-06-03 20:19:05,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-03 20:19:05,062 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 135 transitions, 1148 flow [2024-06-03 20:19:05,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-03 20:19:05,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:05,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:05,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:19:05,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:05,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1618192752, now seen corresponding path program 3 times [2024-06-03 20:19:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191902887] [2024-06-03 20:19:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:05,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191902887] [2024-06-03 20:19:05,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191902887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:05,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389062732] [2024-06-03 20:19:05,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:05,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:05,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:05,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:05,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:05,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:05,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 135 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:05,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:05,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:05,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:06,442 INFO L124 PetriNetUnfolderBase]: 1855/2843 cut-off events. [2024-06-03 20:19:06,443 INFO L125 PetriNetUnfolderBase]: For 69333/69336 co-relation queries the response was YES. [2024-06-03 20:19:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17254 conditions, 2843 events. 1855/2843 cut-off events. For 69333/69336 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14324 event pairs, 538 based on Foata normal form. 8/2847 useless extension candidates. Maximal degree in co-relation 17200. Up to 2546 conditions per place. [2024-06-03 20:19:06,462 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 131 selfloop transitions, 32 changer transitions 0/168 dead transitions. [2024-06-03 20:19:06,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 1616 flow [2024-06-03 20:19:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:19:06,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 20:19:06,464 INFO L175 Difference]: Start difference. First operand has 115 places, 135 transitions, 1148 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:19:06,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 1616 flow [2024-06-03 20:19:06,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1546 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:06,518 INFO L231 Difference]: Finished difference. Result has 117 places, 137 transitions, 1197 flow [2024-06-03 20:19:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=117, PETRI_TRANSITIONS=137} [2024-06-03 20:19:06,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-03 20:19:06,519 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 137 transitions, 1197 flow [2024-06-03 20:19:06,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:06,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:06,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:06,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:19:06,519 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:06,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1611758702, now seen corresponding path program 2 times [2024-06-03 20:19:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:06,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912775095] [2024-06-03 20:19:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:07,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:07,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912775095] [2024-06-03 20:19:07,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912775095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:07,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:07,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:07,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117301671] [2024-06-03 20:19:07,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:07,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:07,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:07,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 137 transitions, 1197 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:07,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:07,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:08,455 INFO L124 PetriNetUnfolderBase]: 1909/2931 cut-off events. [2024-06-03 20:19:08,455 INFO L125 PetriNetUnfolderBase]: For 76737/76740 co-relation queries the response was YES. [2024-06-03 20:19:08,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 2931 events. 1909/2931 cut-off events. For 76737/76740 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14947 event pairs, 496 based on Foata normal form. 4/2931 useless extension candidates. Maximal degree in co-relation 18082. Up to 2484 conditions per place. [2024-06-03 20:19:08,477 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 132 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-03 20:19:08,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 184 transitions, 1981 flow [2024-06-03 20:19:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 20:19:08,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 20:19:08,479 INFO L175 Difference]: Start difference. First operand has 117 places, 137 transitions, 1197 flow. Second operand 8 states and 164 transitions. [2024-06-03 20:19:08,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 184 transitions, 1981 flow [2024-06-03 20:19:08,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 1880 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:08,541 INFO L231 Difference]: Finished difference. Result has 119 places, 146 transitions, 1348 flow [2024-06-03 20:19:08,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=119, PETRI_TRANSITIONS=146} [2024-06-03 20:19:08,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-03 20:19:08,542 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 146 transitions, 1348 flow [2024-06-03 20:19:08,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:08,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:08,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:19:08,543 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:08,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1835226818, now seen corresponding path program 3 times [2024-06-03 20:19:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:08,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979764069] [2024-06-03 20:19:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:09,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:09,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979764069] [2024-06-03 20:19:09,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979764069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:09,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:09,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:09,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314713144] [2024-06-03 20:19:09,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:09,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:09,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:09,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:09,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:09,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:09,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:10,664 INFO L124 PetriNetUnfolderBase]: 1899/2917 cut-off events. [2024-06-03 20:19:10,664 INFO L125 PetriNetUnfolderBase]: For 81379/81382 co-relation queries the response was YES. [2024-06-03 20:19:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18385 conditions, 2917 events. 1899/2917 cut-off events. For 81379/81382 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14844 event pairs, 501 based on Foata normal form. 4/2917 useless extension candidates. Maximal degree in co-relation 18329. Up to 2476 conditions per place. [2024-06-03 20:19:10,683 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 48 changer transitions 0/180 dead transitions. [2024-06-03 20:19:10,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1888 flow [2024-06-03 20:19:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 20:19:10,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 20:19:10,685 INFO L175 Difference]: Start difference. First operand has 119 places, 146 transitions, 1348 flow. Second operand 8 states and 159 transitions. [2024-06-03 20:19:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1888 flow [2024-06-03 20:19:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1783 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:10,762 INFO L231 Difference]: Finished difference. Result has 124 places, 146 transitions, 1347 flow [2024-06-03 20:19:10,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1347, PETRI_PLACES=124, PETRI_TRANSITIONS=146} [2024-06-03 20:19:10,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-03 20:19:10,763 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 146 transitions, 1347 flow [2024-06-03 20:19:10,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:10,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:10,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:10,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:19:10,763 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:10,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash -687560656, now seen corresponding path program 1 times [2024-06-03 20:19:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:10,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366942555] [2024-06-03 20:19:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366942555] [2024-06-03 20:19:12,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366942555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:12,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:12,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855703831] [2024-06-03 20:19:12,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:12,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:12,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 146 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:12,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:12,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:12,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:12,931 INFO L124 PetriNetUnfolderBase]: 1916/2949 cut-off events. [2024-06-03 20:19:12,932 INFO L125 PetriNetUnfolderBase]: For 86553/86556 co-relation queries the response was YES. [2024-06-03 20:19:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18787 conditions, 2949 events. 1916/2949 cut-off events. For 86553/86556 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15052 event pairs, 527 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 18729. Up to 2673 conditions per place. [2024-06-03 20:19:12,953 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 33 changer transitions 0/179 dead transitions. [2024-06-03 20:19:12,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 179 transitions, 1825 flow [2024-06-03 20:19:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:19:12,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 20:19:12,956 INFO L175 Difference]: Start difference. First operand has 124 places, 146 transitions, 1347 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:19:12,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 179 transitions, 1825 flow [2024-06-03 20:19:13,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 179 transitions, 1742 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:13,033 INFO L231 Difference]: Finished difference. Result has 126 places, 148 transitions, 1379 flow [2024-06-03 20:19:13,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1379, PETRI_PLACES=126, PETRI_TRANSITIONS=148} [2024-06-03 20:19:13,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-03 20:19:13,034 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 148 transitions, 1379 flow [2024-06-03 20:19:13,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:13,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:13,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:13,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:19:13,035 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1128776622, now seen corresponding path program 4 times [2024-06-03 20:19:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820271969] [2024-06-03 20:19:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820271969] [2024-06-03 20:19:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820271969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:13,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:13,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905657157] [2024-06-03 20:19:13,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:13,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:13,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:13,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 1379 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:13,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:13,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:13,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:14,583 INFO L124 PetriNetUnfolderBase]: 1900/2916 cut-off events. [2024-06-03 20:19:14,583 INFO L125 PetriNetUnfolderBase]: For 91110/91110 co-relation queries the response was YES. [2024-06-03 20:19:14,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18726 conditions, 2916 events. 1900/2916 cut-off events. For 91110/91110 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14818 event pairs, 541 based on Foata normal form. 8/2912 useless extension candidates. Maximal degree in co-relation 18667. Up to 2613 conditions per place. [2024-06-03 20:19:14,605 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 32 changer transitions 0/178 dead transitions. [2024-06-03 20:19:14,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 178 transitions, 1865 flow [2024-06-03 20:19:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:19:14,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:19:14,607 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 1379 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:19:14,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 178 transitions, 1865 flow [2024-06-03 20:19:14,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 1768 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:14,668 INFO L231 Difference]: Finished difference. Result has 128 places, 150 transitions, 1409 flow [2024-06-03 20:19:14,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=128, PETRI_TRANSITIONS=150} [2024-06-03 20:19:14,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-03 20:19:14,669 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 150 transitions, 1409 flow [2024-06-03 20:19:14,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:14,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:14,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:19:14,670 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:14,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1036689138, now seen corresponding path program 4 times [2024-06-03 20:19:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964179778] [2024-06-03 20:19:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:15,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:15,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964179778] [2024-06-03 20:19:15,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964179778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:15,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:15,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:15,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251333204] [2024-06-03 20:19:15,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:15,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:15,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:15,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:15,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 150 transitions, 1409 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:15,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:15,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:15,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:16,629 INFO L124 PetriNetUnfolderBase]: 1922/2958 cut-off events. [2024-06-03 20:19:16,630 INFO L125 PetriNetUnfolderBase]: For 97197/97197 co-relation queries the response was YES. [2024-06-03 20:19:16,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19161 conditions, 2958 events. 1922/2958 cut-off events. For 97197/97197 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15159 event pairs, 489 based on Foata normal form. 4/2950 useless extension candidates. Maximal degree in co-relation 19101. Up to 2498 conditions per place. [2024-06-03 20:19:16,652 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 51 changer transitions 0/185 dead transitions. [2024-06-03 20:19:16,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 185 transitions, 2022 flow [2024-06-03 20:19:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:19:16,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 20:19:16,654 INFO L175 Difference]: Start difference. First operand has 128 places, 150 transitions, 1409 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:19:16,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 185 transitions, 2022 flow [2024-06-03 20:19:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 185 transitions, 1913 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:16,734 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1467 flow [2024-06-03 20:19:16,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2024-06-03 20:19:16,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-03 20:19:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1467 flow [2024-06-03 20:19:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:16,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:16,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:16,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:19:16,736 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:16,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1030439538, now seen corresponding path program 5 times [2024-06-03 20:19:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:16,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409785620] [2024-06-03 20:19:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:17,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:17,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409785620] [2024-06-03 20:19:17,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409785620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:17,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:17,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:17,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076695529] [2024-06-03 20:19:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:17,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:17,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:17,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1467 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:17,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:17,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:18,733 INFO L124 PetriNetUnfolderBase]: 1944/2995 cut-off events. [2024-06-03 20:19:18,734 INFO L125 PetriNetUnfolderBase]: For 102729/102729 co-relation queries the response was YES. [2024-06-03 20:19:18,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19536 conditions, 2995 events. 1944/2995 cut-off events. For 102729/102729 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15423 event pairs, 494 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 19475. Up to 2517 conditions per place. [2024-06-03 20:19:18,756 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-03 20:19:18,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 187 transitions, 2090 flow [2024-06-03 20:19:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:19:18,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 20:19:18,758 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1467 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:19:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 187 transitions, 2090 flow [2024-06-03 20:19:18,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 1882 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:18,836 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1436 flow [2024-06-03 20:19:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1436, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-03 20:19:18,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-03 20:19:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1436 flow [2024-06-03 20:19:18,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:18,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:18,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:18,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:19:18,839 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:18,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash 683607376, now seen corresponding path program 6 times [2024-06-03 20:19:18,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:18,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860045515] [2024-06-03 20:19:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:18,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860045515] [2024-06-03 20:19:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860045515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:20,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:20,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623424344] [2024-06-03 20:19:20,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:20,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:20,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:20,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1436 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:20,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:20,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:20,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:20,875 INFO L124 PetriNetUnfolderBase]: 1934/2981 cut-off events. [2024-06-03 20:19:20,875 INFO L125 PetriNetUnfolderBase]: For 105085/105085 co-relation queries the response was YES. [2024-06-03 20:19:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19342 conditions, 2981 events. 1934/2981 cut-off events. For 105085/105085 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15318 event pairs, 499 based on Foata normal form. 4/2973 useless extension candidates. Maximal degree in co-relation 19280. Up to 2509 conditions per place. [2024-06-03 20:19:20,899 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 123 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2024-06-03 20:19:20,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1872 flow [2024-06-03 20:19:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:19:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:19:20,902 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1436 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:19:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1872 flow [2024-06-03 20:19:20,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 183 transitions, 1723 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:20,991 INFO L231 Difference]: Finished difference. Result has 134 places, 156 transitions, 1405 flow [2024-06-03 20:19:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1405, PETRI_PLACES=134, PETRI_TRANSITIONS=156} [2024-06-03 20:19:20,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-03 20:19:20,991 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 156 transitions, 1405 flow [2024-06-03 20:19:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:20,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:20,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:19:20,992 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:20,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 493849730, now seen corresponding path program 2 times [2024-06-03 20:19:20,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:20,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452485026] [2024-06-03 20:19:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:22,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:22,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452485026] [2024-06-03 20:19:22,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452485026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:22,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:22,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:22,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9487500] [2024-06-03 20:19:22,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:22,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:22,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:22,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 156 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:22,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:23,069 INFO L124 PetriNetUnfolderBase]: 1951/3018 cut-off events. [2024-06-03 20:19:23,069 INFO L125 PetriNetUnfolderBase]: For 110778/110778 co-relation queries the response was YES. [2024-06-03 20:19:23,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19605 conditions, 3018 events. 1951/3018 cut-off events. For 110778/110778 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15509 event pairs, 512 based on Foata normal form. 4/3013 useless extension candidates. Maximal degree in co-relation 19542. Up to 2726 conditions per place. [2024-06-03 20:19:23,094 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 33 changer transitions 0/187 dead transitions. [2024-06-03 20:19:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1899 flow [2024-06-03 20:19:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:19:23,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 20:19:23,096 INFO L175 Difference]: Start difference. First operand has 134 places, 156 transitions, 1405 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:19:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1899 flow [2024-06-03 20:19:23,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 187 transitions, 1764 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:19:23,198 INFO L231 Difference]: Finished difference. Result has 134 places, 158 transitions, 1391 flow [2024-06-03 20:19:23,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=134, PETRI_TRANSITIONS=158} [2024-06-03 20:19:23,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-03 20:19:23,198 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 158 transitions, 1391 flow [2024-06-03 20:19:23,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:23,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:23,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:19:23,199 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:23,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:23,199 INFO L85 PathProgramCache]: Analyzing trace with hash 693735634, now seen corresponding path program 3 times [2024-06-03 20:19:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:23,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113244397] [2024-06-03 20:19:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:23,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113244397] [2024-06-03 20:19:24,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113244397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:24,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:24,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468777544] [2024-06-03 20:19:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:24,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:24,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 158 transitions, 1391 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:24,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:25,421 INFO L124 PetriNetUnfolderBase]: 1968/3055 cut-off events. [2024-06-03 20:19:25,422 INFO L125 PetriNetUnfolderBase]: For 117845/117845 co-relation queries the response was YES. [2024-06-03 20:19:25,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19968 conditions, 3055 events. 1968/3055 cut-off events. For 117845/117845 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15861 event pairs, 517 based on Foata normal form. 4/3050 useless extension candidates. Maximal degree in co-relation 19904. Up to 2753 conditions per place. [2024-06-03 20:19:25,443 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 33 changer transitions 0/187 dead transitions. [2024-06-03 20:19:25,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1883 flow [2024-06-03 20:19:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:19:25,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 20:19:25,445 INFO L175 Difference]: Start difference. First operand has 134 places, 158 transitions, 1391 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:19:25,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1883 flow [2024-06-03 20:19:25,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 187 transitions, 1780 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:25,550 INFO L231 Difference]: Finished difference. Result has 136 places, 160 transitions, 1413 flow [2024-06-03 20:19:25,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1413, PETRI_PLACES=136, PETRI_TRANSITIONS=160} [2024-06-03 20:19:25,550 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-03 20:19:25,550 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 160 transitions, 1413 flow [2024-06-03 20:19:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:25,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:25,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:25,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:19:25,551 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:25,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash 694091824, now seen corresponding path program 4 times [2024-06-03 20:19:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:25,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43176471] [2024-06-03 20:19:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:26,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43176471] [2024-06-03 20:19:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43176471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:26,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:26,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130590998] [2024-06-03 20:19:26,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:26,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:26,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:26,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 160 transitions, 1413 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:26,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:26,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:26,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:27,418 INFO L124 PetriNetUnfolderBase]: 1960/3043 cut-off events. [2024-06-03 20:19:27,419 INFO L125 PetriNetUnfolderBase]: For 122608/122608 co-relation queries the response was YES. [2024-06-03 20:19:27,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20010 conditions, 3043 events. 1960/3043 cut-off events. For 122608/122608 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15818 event pairs, 485 based on Foata normal form. 4/3038 useless extension candidates. Maximal degree in co-relation 19945. Up to 2664 conditions per place. [2024-06-03 20:19:27,443 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 40 changer transitions 0/189 dead transitions. [2024-06-03 20:19:27,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1913 flow [2024-06-03 20:19:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:19:27,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 20:19:27,445 INFO L175 Difference]: Start difference. First operand has 136 places, 160 transitions, 1413 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:19:27,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1913 flow [2024-06-03 20:19:27,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 1806 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:27,579 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1449 flow [2024-06-03 20:19:27,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-03 20:19:27,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-03 20:19:27,580 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1449 flow [2024-06-03 20:19:27,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:19:27,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:27,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:27,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:19:27,580 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:27,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash -927914219, now seen corresponding path program 1 times [2024-06-03 20:19:27,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:27,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888312926] [2024-06-03 20:19:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:27,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:28,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888312926] [2024-06-03 20:19:28,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888312926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:28,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:28,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874148221] [2024-06-03 20:19:28,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:28,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:28,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:28,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:28,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:28,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:28,799 INFO L124 PetriNetUnfolderBase]: 1957/3037 cut-off events. [2024-06-03 20:19:28,799 INFO L125 PetriNetUnfolderBase]: For 127010/127010 co-relation queries the response was YES. [2024-06-03 20:19:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 3037 events. 1957/3037 cut-off events. For 127010/127010 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15736 event pairs, 606 based on Foata normal form. 1/3035 useless extension candidates. Maximal degree in co-relation 20135. Up to 2889 conditions per place. [2024-06-03 20:19:28,826 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 154 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-03 20:19:28,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 175 transitions, 1829 flow [2024-06-03 20:19:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 20:19:28,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 20:19:28,827 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1449 flow. Second operand 6 states and 106 transitions. [2024-06-03 20:19:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 175 transitions, 1829 flow [2024-06-03 20:19:28,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 175 transitions, 1690 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:28,946 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1352 flow [2024-06-03 20:19:28,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-03 20:19:28,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-03 20:19:28,946 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1352 flow [2024-06-03 20:19:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:28,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:28,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:28,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:19:28,947 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:28,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2107001350, now seen corresponding path program 1 times [2024-06-03 20:19:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871663304] [2024-06-03 20:19:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871663304] [2024-06-03 20:19:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871663304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336898988] [2024-06-03 20:19:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:29,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:29,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:29,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:29,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:29,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:30,170 INFO L124 PetriNetUnfolderBase]: 2013/3124 cut-off events. [2024-06-03 20:19:30,171 INFO L125 PetriNetUnfolderBase]: For 136341/136341 co-relation queries the response was YES. [2024-06-03 20:19:30,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20631 conditions, 3124 events. 2013/3124 cut-off events. For 136341/136341 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16312 event pairs, 577 based on Foata normal form. 4/3116 useless extension candidates. Maximal degree in co-relation 20564. Up to 2859 conditions per place. [2024-06-03 20:19:30,196 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-03 20:19:30,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 1969 flow [2024-06-03 20:19:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:19:30,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:19:30,198 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1352 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:19:30,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 1969 flow [2024-06-03 20:19:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 191 transitions, 1927 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:30,331 INFO L231 Difference]: Finished difference. Result has 142 places, 175 transitions, 1551 flow [2024-06-03 20:19:30,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1551, PETRI_PLACES=142, PETRI_TRANSITIONS=175} [2024-06-03 20:19:30,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-03 20:19:30,331 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 175 transitions, 1551 flow [2024-06-03 20:19:30,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:30,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:30,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:19:30,332 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:30,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash 123341806, now seen corresponding path program 2 times [2024-06-03 20:19:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671396476] [2024-06-03 20:19:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671396476] [2024-06-03 20:19:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671396476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:31,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:31,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:31,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804782444] [2024-06-03 20:19:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:31,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:31,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 175 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:31,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:31,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:31,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:31,639 INFO L124 PetriNetUnfolderBase]: 2085/3228 cut-off events. [2024-06-03 20:19:31,639 INFO L125 PetriNetUnfolderBase]: For 148425/148428 co-relation queries the response was YES. [2024-06-03 20:19:31,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 3228 events. 2085/3228 cut-off events. For 148425/148428 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16827 event pairs, 600 based on Foata normal form. 4/3221 useless extension candidates. Maximal degree in co-relation 22001. Up to 2715 conditions per place. [2024-06-03 20:19:31,666 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 59 changer transitions 0/214 dead transitions. [2024-06-03 20:19:31,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 214 transitions, 2463 flow [2024-06-03 20:19:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:19:31,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 20:19:31,668 INFO L175 Difference]: Start difference. First operand has 142 places, 175 transitions, 1551 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:19:31,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 214 transitions, 2463 flow [2024-06-03 20:19:31,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 214 transitions, 2404 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:31,807 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 1957 flow [2024-06-03 20:19:31,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-06-03 20:19:31,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-03 20:19:31,808 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 1957 flow [2024-06-03 20:19:31,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:31,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:31,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:19:31,808 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 123608716, now seen corresponding path program 3 times [2024-06-03 20:19:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810743340] [2024-06-03 20:19:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:32,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:32,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810743340] [2024-06-03 20:19:32,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810743340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:32,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:32,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50928819] [2024-06-03 20:19:32,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:32,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:32,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:32,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:32,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:32,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:32,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:32,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:32,967 INFO L124 PetriNetUnfolderBase]: 2075/3210 cut-off events. [2024-06-03 20:19:32,968 INFO L125 PetriNetUnfolderBase]: For 156851/156854 co-relation queries the response was YES. [2024-06-03 20:19:32,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22497 conditions, 3210 events. 2075/3210 cut-off events. For 156851/156854 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16693 event pairs, 595 based on Foata normal form. 8/3207 useless extension candidates. Maximal degree in co-relation 22423. Up to 2717 conditions per place. [2024-06-03 20:19:32,997 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-03 20:19:32,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 217 transitions, 2672 flow [2024-06-03 20:19:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:19:32,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 20:19:32,999 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 1957 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:19:32,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 217 transitions, 2672 flow [2024-06-03 20:19:33,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 217 transitions, 2577 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:33,165 INFO L231 Difference]: Finished difference. Result has 154 places, 202 transitions, 2109 flow [2024-06-03 20:19:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=154, PETRI_TRANSITIONS=202} [2024-06-03 20:19:33,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-03 20:19:33,166 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 202 transitions, 2109 flow [2024-06-03 20:19:33,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:33,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:33,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:19:33,167 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:33,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 123618636, now seen corresponding path program 1 times [2024-06-03 20:19:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488734735] [2024-06-03 20:19:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:33,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:34,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488734735] [2024-06-03 20:19:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488734735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:34,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:34,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204519125] [2024-06-03 20:19:34,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:34,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:34,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 202 transitions, 2109 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:34,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:34,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:34,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:34,958 INFO L124 PetriNetUnfolderBase]: 2133/3307 cut-off events. [2024-06-03 20:19:34,958 INFO L125 PetriNetUnfolderBase]: For 167481/167481 co-relation queries the response was YES. [2024-06-03 20:19:34,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23347 conditions, 3307 events. 2133/3307 cut-off events. For 167481/167481 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17174 event pairs, 599 based on Foata normal form. 16/3311 useless extension candidates. Maximal degree in co-relation 23271. Up to 2995 conditions per place. [2024-06-03 20:19:34,984 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 179 selfloop transitions, 52 changer transitions 0/236 dead transitions. [2024-06-03 20:19:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 236 transitions, 2932 flow [2024-06-03 20:19:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:19:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:19:34,986 INFO L175 Difference]: Start difference. First operand has 154 places, 202 transitions, 2109 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:19:34,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 236 transitions, 2932 flow [2024-06-03 20:19:35,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 2800 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:35,148 INFO L231 Difference]: Finished difference. Result has 162 places, 218 transitions, 2384 flow [2024-06-03 20:19:35,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=162, PETRI_TRANSITIONS=218} [2024-06-03 20:19:35,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-03 20:19:35,149 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 218 transitions, 2384 flow [2024-06-03 20:19:35,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:35,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:35,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:19:35,150 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:35,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1346319005, now seen corresponding path program 1 times [2024-06-03 20:19:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250545454] [2024-06-03 20:19:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:35,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250545454] [2024-06-03 20:19:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250545454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:35,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218439967] [2024-06-03 20:19:35,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:35,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 218 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:35,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:35,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:35,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:36,649 INFO L124 PetriNetUnfolderBase]: 2150/3337 cut-off events. [2024-06-03 20:19:36,649 INFO L125 PetriNetUnfolderBase]: For 179350/179350 co-relation queries the response was YES. [2024-06-03 20:19:36,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24609 conditions, 3337 events. 2150/3337 cut-off events. For 179350/179350 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17382 event pairs, 584 based on Foata normal form. 1/3335 useless extension candidates. Maximal degree in co-relation 24529. Up to 3150 conditions per place. [2024-06-03 20:19:36,680 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-03 20:19:36,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 250 transitions, 3034 flow [2024-06-03 20:19:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:19:36,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 20:19:36,682 INFO L175 Difference]: Start difference. First operand has 162 places, 218 transitions, 2384 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:19:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 250 transitions, 3034 flow [2024-06-03 20:19:36,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 250 transitions, 2919 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:36,929 INFO L231 Difference]: Finished difference. Result has 169 places, 226 transitions, 2424 flow [2024-06-03 20:19:36,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=169, PETRI_TRANSITIONS=226} [2024-06-03 20:19:36,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-03 20:19:36,930 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 226 transitions, 2424 flow [2024-06-03 20:19:36,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:36,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:36,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:19:36,933 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:36,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1607134213, now seen corresponding path program 2 times [2024-06-03 20:19:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725920253] [2024-06-03 20:19:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:37,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:37,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725920253] [2024-06-03 20:19:37,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725920253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559002387] [2024-06-03 20:19:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:37,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:37,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 226 transitions, 2424 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:37,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:37,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:38,535 INFO L124 PetriNetUnfolderBase]: 2130/3304 cut-off events. [2024-06-03 20:19:38,535 INFO L125 PetriNetUnfolderBase]: For 184750/184750 co-relation queries the response was YES. [2024-06-03 20:19:38,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24416 conditions, 3304 events. 2130/3304 cut-off events. For 184750/184750 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17184 event pairs, 581 based on Foata normal form. 1/3302 useless extension candidates. Maximal degree in co-relation 24333. Up to 3114 conditions per place. [2024-06-03 20:19:38,566 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 218 selfloop transitions, 23 changer transitions 0/246 dead transitions. [2024-06-03 20:19:38,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 246 transitions, 2974 flow [2024-06-03 20:19:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:19:38,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:19:38,567 INFO L175 Difference]: Start difference. First operand has 169 places, 226 transitions, 2424 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:19:38,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 246 transitions, 2974 flow [2024-06-03 20:19:38,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 246 transitions, 2886 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:38,766 INFO L231 Difference]: Finished difference. Result has 171 places, 226 transitions, 2392 flow [2024-06-03 20:19:38,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=171, PETRI_TRANSITIONS=226} [2024-06-03 20:19:38,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-03 20:19:38,766 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 226 transitions, 2392 flow [2024-06-03 20:19:38,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:38,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:19:38,767 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:38,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1794376929, now seen corresponding path program 1 times [2024-06-03 20:19:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779756112] [2024-06-03 20:19:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:39,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779756112] [2024-06-03 20:19:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779756112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:39,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:39,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707538750] [2024-06-03 20:19:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:39,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:39,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:39,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:39,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 226 transitions, 2392 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:39,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:39,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:39,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:40,174 INFO L124 PetriNetUnfolderBase]: 2140/3319 cut-off events. [2024-06-03 20:19:40,175 INFO L125 PetriNetUnfolderBase]: For 193433/193436 co-relation queries the response was YES. [2024-06-03 20:19:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24668 conditions, 3319 events. 2140/3319 cut-off events. For 193433/193436 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17248 event pairs, 587 based on Foata normal form. 2/3317 useless extension candidates. Maximal degree in co-relation 24584. Up to 3090 conditions per place. [2024-06-03 20:19:40,207 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-03 20:19:40,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3001 flow [2024-06-03 20:19:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 20:19:40,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-03 20:19:40,209 INFO L175 Difference]: Start difference. First operand has 171 places, 226 transitions, 2392 flow. Second operand 7 states and 128 transitions. [2024-06-03 20:19:40,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3001 flow [2024-06-03 20:19:40,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 249 transitions, 2914 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:40,387 INFO L231 Difference]: Finished difference. Result has 173 places, 230 transitions, 2437 flow [2024-06-03 20:19:40,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2437, PETRI_PLACES=173, PETRI_TRANSITIONS=230} [2024-06-03 20:19:40,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-03 20:19:40,388 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 230 transitions, 2437 flow [2024-06-03 20:19:40,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:40,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:40,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:40,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:19:40,388 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:40,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1595701413, now seen corresponding path program 2 times [2024-06-03 20:19:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:40,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082549720] [2024-06-03 20:19:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:40,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082549720] [2024-06-03 20:19:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082549720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:41,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605969375] [2024-06-03 20:19:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:41,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:41,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 230 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:41,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:41,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:41,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:41,739 INFO L124 PetriNetUnfolderBase]: 2174/3363 cut-off events. [2024-06-03 20:19:41,740 INFO L125 PetriNetUnfolderBase]: For 197130/197133 co-relation queries the response was YES. [2024-06-03 20:19:41,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25205 conditions, 3363 events. 2174/3363 cut-off events. For 197130/197133 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17502 event pairs, 592 based on Foata normal form. 2/3361 useless extension candidates. Maximal degree in co-relation 25119. Up to 3108 conditions per place. [2024-06-03 20:19:41,772 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 39 changer transitions 0/257 dead transitions. [2024-06-03 20:19:41,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 257 transitions, 3237 flow [2024-06-03 20:19:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 20:19:41,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-03 20:19:41,779 INFO L175 Difference]: Start difference. First operand has 173 places, 230 transitions, 2437 flow. Second operand 7 states and 128 transitions. [2024-06-03 20:19:41,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 257 transitions, 3237 flow [2024-06-03 20:19:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 257 transitions, 3190 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:42,030 INFO L231 Difference]: Finished difference. Result has 178 places, 239 transitions, 2660 flow [2024-06-03 20:19:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2660, PETRI_PLACES=178, PETRI_TRANSITIONS=239} [2024-06-03 20:19:42,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-03 20:19:42,033 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 239 transitions, 2660 flow [2024-06-03 20:19:42,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:42,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:42,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:42,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:19:42,034 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:42,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1768755741, now seen corresponding path program 3 times [2024-06-03 20:19:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:42,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852043068] [2024-06-03 20:19:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:42,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852043068] [2024-06-03 20:19:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852043068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:42,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383246310] [2024-06-03 20:19:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:42,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:42,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 239 transitions, 2660 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:42,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:42,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:42,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:43,433 INFO L124 PetriNetUnfolderBase]: 2168/3354 cut-off events. [2024-06-03 20:19:43,433 INFO L125 PetriNetUnfolderBase]: For 203709/203709 co-relation queries the response was YES. [2024-06-03 20:19:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25396 conditions, 3354 events. 2168/3354 cut-off events. For 203709/203709 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17445 event pairs, 608 based on Foata normal form. 2/3344 useless extension candidates. Maximal degree in co-relation 25308. Up to 3129 conditions per place. [2024-06-03 20:19:43,468 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 221 selfloop transitions, 30 changer transitions 0/256 dead transitions. [2024-06-03 20:19:43,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 256 transitions, 3222 flow [2024-06-03 20:19:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:19:43,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 20:19:43,470 INFO L175 Difference]: Start difference. First operand has 178 places, 239 transitions, 2660 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:19:43,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 256 transitions, 3222 flow [2024-06-03 20:19:43,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 3144 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:43,732 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2648 flow [2024-06-03 20:19:43,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2648, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-03 20:19:43,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-03 20:19:43,733 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2648 flow [2024-06-03 20:19:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:43,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:43,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:43,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:19:43,734 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:43,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1304064605, now seen corresponding path program 4 times [2024-06-03 20:19:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:43,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309344767] [2024-06-03 20:19:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309344767] [2024-06-03 20:19:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309344767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484805497] [2024-06-03 20:19:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:44,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:44,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2648 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:44,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:44,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:44,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:45,050 INFO L124 PetriNetUnfolderBase]: 2152/3332 cut-off events. [2024-06-03 20:19:45,050 INFO L125 PetriNetUnfolderBase]: For 209306/209306 co-relation queries the response was YES. [2024-06-03 20:19:45,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25217 conditions, 3332 events. 2152/3332 cut-off events. For 209306/209306 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17403 event pairs, 600 based on Foata normal form. 4/3324 useless extension candidates. Maximal degree in co-relation 25128. Up to 3055 conditions per place. [2024-06-03 20:19:45,134 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-06-03 20:19:45,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3198 flow [2024-06-03 20:19:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:19:45,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-03 20:19:45,136 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2648 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:19:45,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3198 flow [2024-06-03 20:19:45,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 3100 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:45,378 INFO L231 Difference]: Finished difference. Result has 181 places, 239 transitions, 2638 flow [2024-06-03 20:19:45,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2638, PETRI_PLACES=181, PETRI_TRANSITIONS=239} [2024-06-03 20:19:45,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-03 20:19:45,379 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 239 transitions, 2638 flow [2024-06-03 20:19:45,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:45,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:45,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:45,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:19:45,380 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:45,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -478051585, now seen corresponding path program 5 times [2024-06-03 20:19:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:45,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672811371] [2024-06-03 20:19:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:46,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672811371] [2024-06-03 20:19:46,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672811371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:46,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:46,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:46,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209623033] [2024-06-03 20:19:46,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:46,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:46,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:46,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 239 transitions, 2638 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:46,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:46,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:46,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:46,790 INFO L124 PetriNetUnfolderBase]: 2186/3397 cut-off events. [2024-06-03 20:19:46,790 INFO L125 PetriNetUnfolderBase]: For 220070/220073 co-relation queries the response was YES. [2024-06-03 20:19:46,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25713 conditions, 3397 events. 2186/3397 cut-off events. For 220070/220073 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17852 event pairs, 592 based on Foata normal form. 6/3392 useless extension candidates. Maximal degree in co-relation 25625. Up to 2844 conditions per place. [2024-06-03 20:19:46,819 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 172 selfloop transitions, 84 changer transitions 0/261 dead transitions. [2024-06-03 20:19:46,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 261 transitions, 3489 flow [2024-06-03 20:19:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:19:46,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 20:19:46,820 INFO L175 Difference]: Start difference. First operand has 181 places, 239 transitions, 2638 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:19:46,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 261 transitions, 3489 flow [2024-06-03 20:19:47,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 261 transitions, 3379 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:47,128 INFO L231 Difference]: Finished difference. Result has 182 places, 246 transitions, 2812 flow [2024-06-03 20:19:47,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2812, PETRI_PLACES=182, PETRI_TRANSITIONS=246} [2024-06-03 20:19:47,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-03 20:19:47,129 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 246 transitions, 2812 flow [2024-06-03 20:19:47,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:47,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:47,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:47,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:19:47,130 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:47,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:47,130 INFO L85 PathProgramCache]: Analyzing trace with hash -471385345, now seen corresponding path program 6 times [2024-06-03 20:19:47,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:47,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225036155] [2024-06-03 20:19:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:47,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:47,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:47,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225036155] [2024-06-03 20:19:47,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225036155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:47,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:47,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:47,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201911820] [2024-06-03 20:19:47,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:47,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:47,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 246 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:47,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:47,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:47,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:48,509 INFO L124 PetriNetUnfolderBase]: 2162/3357 cut-off events. [2024-06-03 20:19:48,509 INFO L125 PetriNetUnfolderBase]: For 222516/222519 co-relation queries the response was YES. [2024-06-03 20:19:48,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 3357 events. 2162/3357 cut-off events. For 222516/222519 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17577 event pairs, 605 based on Foata normal form. 6/3352 useless extension candidates. Maximal degree in co-relation 25492. Up to 2828 conditions per place. [2024-06-03 20:19:48,543 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 175 selfloop transitions, 80 changer transitions 0/260 dead transitions. [2024-06-03 20:19:48,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 260 transitions, 3464 flow [2024-06-03 20:19:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:19:48,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 20:19:48,544 INFO L175 Difference]: Start difference. First operand has 182 places, 246 transitions, 2812 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:19:48,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 260 transitions, 3464 flow [2024-06-03 20:19:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 260 transitions, 3167 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:48,838 INFO L231 Difference]: Finished difference. Result has 183 places, 246 transitions, 2688 flow [2024-06-03 20:19:48,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2688, PETRI_PLACES=183, PETRI_TRANSITIONS=246} [2024-06-03 20:19:48,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-03 20:19:48,839 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 246 transitions, 2688 flow [2024-06-03 20:19:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:48,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:48,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:48,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:19:48,839 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:48,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 207655867, now seen corresponding path program 1 times [2024-06-03 20:19:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:48,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034374921] [2024-06-03 20:19:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:48,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034374921] [2024-06-03 20:19:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034374921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:49,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547539574] [2024-06-03 20:19:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:49,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:49,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:49,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 246 transitions, 2688 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:49,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:49,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:50,264 INFO L124 PetriNetUnfolderBase]: 2172/3372 cut-off events. [2024-06-03 20:19:50,264 INFO L125 PetriNetUnfolderBase]: For 224316/224316 co-relation queries the response was YES. [2024-06-03 20:19:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25669 conditions, 3372 events. 2172/3372 cut-off events. For 224316/224316 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17643 event pairs, 592 based on Foata normal form. 2/3365 useless extension candidates. Maximal degree in co-relation 25580. Up to 3154 conditions per place. [2024-06-03 20:19:50,297 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 37 changer transitions 0/265 dead transitions. [2024-06-03 20:19:50,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 265 transitions, 3372 flow [2024-06-03 20:19:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:19:50,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-03 20:19:50,299 INFO L175 Difference]: Start difference. First operand has 183 places, 246 transitions, 2688 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:19:50,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 265 transitions, 3372 flow [2024-06-03 20:19:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 3169 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:50,537 INFO L231 Difference]: Finished difference. Result has 184 places, 252 transitions, 2680 flow [2024-06-03 20:19:50,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2680, PETRI_PLACES=184, PETRI_TRANSITIONS=252} [2024-06-03 20:19:50,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-03 20:19:50,538 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 252 transitions, 2680 flow [2024-06-03 20:19:50,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:50,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:50,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:19:50,539 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:50,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:50,539 INFO L85 PathProgramCache]: Analyzing trace with hash 208160857, now seen corresponding path program 2 times [2024-06-03 20:19:50,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:50,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551720058] [2024-06-03 20:19:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:51,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:51,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551720058] [2024-06-03 20:19:51,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551720058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:51,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:51,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236133619] [2024-06-03 20:19:51,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:51,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:51,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:51,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:51,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 252 transitions, 2680 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:51,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:51,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:51,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:52,057 INFO L124 PetriNetUnfolderBase]: 2170/3371 cut-off events. [2024-06-03 20:19:52,058 INFO L125 PetriNetUnfolderBase]: For 228923/228923 co-relation queries the response was YES. [2024-06-03 20:19:52,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25769 conditions, 3371 events. 2170/3371 cut-off events. For 228923/228923 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17684 event pairs, 592 based on Foata normal form. 1/3363 useless extension candidates. Maximal degree in co-relation 25679. Up to 3139 conditions per place. [2024-06-03 20:19:52,091 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-03 20:19:52,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 270 transitions, 3328 flow [2024-06-03 20:19:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:19:52,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-03 20:19:52,093 INFO L175 Difference]: Start difference. First operand has 184 places, 252 transitions, 2680 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:19:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 270 transitions, 3328 flow [2024-06-03 20:19:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 270 transitions, 3206 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:52,392 INFO L231 Difference]: Finished difference. Result has 187 places, 257 transitions, 2730 flow [2024-06-03 20:19:52,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=187, PETRI_TRANSITIONS=257} [2024-06-03 20:19:52,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-03 20:19:52,393 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 257 transitions, 2730 flow [2024-06-03 20:19:52,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:52,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:52,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:52,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:19:52,393 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1299311933, now seen corresponding path program 1 times [2024-06-03 20:19:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:52,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532299409] [2024-06-03 20:19:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532299409] [2024-06-03 20:19:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532299409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:53,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857013753] [2024-06-03 20:19:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:53,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 257 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:53,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:53,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:53,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:54,123 INFO L124 PetriNetUnfolderBase]: 2180/3392 cut-off events. [2024-06-03 20:19:54,123 INFO L125 PetriNetUnfolderBase]: For 238826/238826 co-relation queries the response was YES. [2024-06-03 20:19:54,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26070 conditions, 3392 events. 2180/3392 cut-off events. For 238826/238826 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17869 event pairs, 565 based on Foata normal form. 2/3391 useless extension candidates. Maximal degree in co-relation 25978. Up to 3193 conditions per place. [2024-06-03 20:19:54,157 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 16 changer transitions 0/278 dead transitions. [2024-06-03 20:19:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 3384 flow [2024-06-03 20:19:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:19:54,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-03 20:19:54,170 INFO L175 Difference]: Start difference. First operand has 187 places, 257 transitions, 2730 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:19:54,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 3384 flow [2024-06-03 20:19:54,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 278 transitions, 3289 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:54,403 INFO L231 Difference]: Finished difference. Result has 190 places, 260 transitions, 2727 flow [2024-06-03 20:19:54,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2727, PETRI_PLACES=190, PETRI_TRANSITIONS=260} [2024-06-03 20:19:54,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-03 20:19:54,404 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 260 transitions, 2727 flow [2024-06-03 20:19:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:54,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:54,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:54,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:19:54,405 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1707660091, now seen corresponding path program 1 times [2024-06-03 20:19:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768461050] [2024-06-03 20:19:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768461050] [2024-06-03 20:19:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768461050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:55,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521416597] [2024-06-03 20:19:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:55,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:55,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 260 transitions, 2727 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:55,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:55,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:55,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:56,038 INFO L124 PetriNetUnfolderBase]: 2174/3369 cut-off events. [2024-06-03 20:19:56,038 INFO L125 PetriNetUnfolderBase]: For 244221/244221 co-relation queries the response was YES. [2024-06-03 20:19:56,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26253 conditions, 3369 events. 2174/3369 cut-off events. For 244221/244221 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17604 event pairs, 583 based on Foata normal form. 2/3362 useless extension candidates. Maximal degree in co-relation 26160. Up to 3060 conditions per place. [2024-06-03 20:19:56,072 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 52 changer transitions 0/279 dead transitions. [2024-06-03 20:19:56,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 279 transitions, 3466 flow [2024-06-03 20:19:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:19:56,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:19:56,074 INFO L175 Difference]: Start difference. First operand has 190 places, 260 transitions, 2727 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:19:56,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 279 transitions, 3466 flow [2024-06-03 20:19:56,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 279 transitions, 3378 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:56,366 INFO L231 Difference]: Finished difference. Result has 193 places, 263 transitions, 2828 flow [2024-06-03 20:19:56,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=193, PETRI_TRANSITIONS=263} [2024-06-03 20:19:56,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-03 20:19:56,367 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 263 transitions, 2828 flow [2024-06-03 20:19:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:56,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:56,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:19:56,367 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:56,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -699450547, now seen corresponding path program 2 times [2024-06-03 20:19:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:56,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411298682] [2024-06-03 20:19:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:57,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411298682] [2024-06-03 20:19:57,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411298682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:57,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:57,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:57,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827399068] [2024-06-03 20:19:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:57,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:57,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:57,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:57,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:57,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:57,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 263 transitions, 2828 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:57,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:57,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:57,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:58,099 INFO L124 PetriNetUnfolderBase]: 2184/3396 cut-off events. [2024-06-03 20:19:58,099 INFO L125 PetriNetUnfolderBase]: For 253513/253513 co-relation queries the response was YES. [2024-06-03 20:19:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26704 conditions, 3396 events. 2184/3396 cut-off events. For 253513/253513 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17875 event pairs, 557 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 26609. Up to 3182 conditions per place. [2024-06-03 20:19:58,135 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 254 selfloop transitions, 24 changer transitions 0/283 dead transitions. [2024-06-03 20:19:58,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 283 transitions, 3492 flow [2024-06-03 20:19:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:19:58,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 20:19:58,137 INFO L175 Difference]: Start difference. First operand has 193 places, 263 transitions, 2828 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:19:58,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 283 transitions, 3492 flow [2024-06-03 20:19:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 283 transitions, 3372 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:58,433 INFO L231 Difference]: Finished difference. Result has 195 places, 266 transitions, 2823 flow [2024-06-03 20:19:58,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=195, PETRI_TRANSITIONS=266} [2024-06-03 20:19:58,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-03 20:19:58,434 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 266 transitions, 2823 flow [2024-06-03 20:19:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:58,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:58,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:58,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:19:58,435 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:58,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash -471376417, now seen corresponding path program 3 times [2024-06-03 20:19:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:58,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871092716] [2024-06-03 20:19:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:58,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871092716] [2024-06-03 20:19:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871092716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:59,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:59,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762082015] [2024-06-03 20:19:59,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:19:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 266 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:19:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:00,264 INFO L124 PetriNetUnfolderBase]: 2178/3387 cut-off events. [2024-06-03 20:20:00,264 INFO L125 PetriNetUnfolderBase]: For 248731/248734 co-relation queries the response was YES. [2024-06-03 20:20:00,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26573 conditions, 3387 events. 2178/3387 cut-off events. For 248731/248734 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17856 event pairs, 568 based on Foata normal form. 2/3385 useless extension candidates. Maximal degree in co-relation 26478. Up to 3159 conditions per place. [2024-06-03 20:20:00,294 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 249 selfloop transitions, 30 changer transitions 0/284 dead transitions. [2024-06-03 20:20:00,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 284 transitions, 3487 flow [2024-06-03 20:20:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:20:00,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 20:20:00,295 INFO L175 Difference]: Start difference. First operand has 195 places, 266 transitions, 2823 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:20:00,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 284 transitions, 3487 flow [2024-06-03 20:20:00,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 284 transitions, 3369 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:00,516 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 2837 flow [2024-06-03 20:20:00,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2837, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2024-06-03 20:20:00,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-03 20:20:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 2837 flow [2024-06-03 20:20:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:00,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:00,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:20:00,517 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:00,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -79326169, now seen corresponding path program 1 times [2024-06-03 20:20:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120298241] [2024-06-03 20:20:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:01,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120298241] [2024-06-03 20:20:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120298241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:01,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:01,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:01,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588872545] [2024-06-03 20:20:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:01,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:01,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 2837 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:01,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:01,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:01,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:02,776 INFO L124 PetriNetUnfolderBase]: 2347/3659 cut-off events. [2024-06-03 20:20:02,777 INFO L125 PetriNetUnfolderBase]: For 297740/297740 co-relation queries the response was YES. [2024-06-03 20:20:02,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29385 conditions, 3659 events. 2347/3659 cut-off events. For 297740/297740 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19853 event pairs, 492 based on Foata normal form. 16/3672 useless extension candidates. Maximal degree in co-relation 29290. Up to 3031 conditions per place. [2024-06-03 20:20:02,816 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 29 changer transitions 0/322 dead transitions. [2024-06-03 20:20:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 322 transitions, 3919 flow [2024-06-03 20:20:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 20:20:02,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 20:20:02,848 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 2837 flow. Second operand 10 states and 192 transitions. [2024-06-03 20:20:02,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 322 transitions, 3919 flow [2024-06-03 20:20:03,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 322 transitions, 3811 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:03,227 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 2875 flow [2024-06-03 20:20:03,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2875, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2024-06-03 20:20:03,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-03 20:20:03,228 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 2875 flow [2024-06-03 20:20:03,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:03,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:03,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:03,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:20:03,229 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash 480429909, now seen corresponding path program 2 times [2024-06-03 20:20:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255183021] [2024-06-03 20:20:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:04,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255183021] [2024-06-03 20:20:04,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255183021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:04,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:04,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:04,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664124214] [2024-06-03 20:20:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:04,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:04,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:04,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 2875 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:04,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:04,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:05,502 INFO L124 PetriNetUnfolderBase]: 2405/3767 cut-off events. [2024-06-03 20:20:05,503 INFO L125 PetriNetUnfolderBase]: For 307133/307133 co-relation queries the response was YES. [2024-06-03 20:20:05,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30255 conditions, 3767 events. 2405/3767 cut-off events. For 307133/307133 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20432 event pairs, 603 based on Foata normal form. 16/3780 useless extension candidates. Maximal degree in co-relation 30159. Up to 3221 conditions per place. [2024-06-03 20:20:05,536 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 286 selfloop transitions, 26 changer transitions 0/317 dead transitions. [2024-06-03 20:20:05,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 3893 flow [2024-06-03 20:20:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 20:20:05,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 20:20:05,538 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 2875 flow. Second operand 9 states and 174 transitions. [2024-06-03 20:20:05,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 3893 flow [2024-06-03 20:20:05,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 317 transitions, 3828 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:05,968 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 2910 flow [2024-06-03 20:20:05,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-03 20:20:05,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-03 20:20:05,969 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 2910 flow [2024-06-03 20:20:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:05,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:05,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:05,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:20:05,969 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:05,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:05,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1136551503, now seen corresponding path program 3 times [2024-06-03 20:20:05,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718815002] [2024-06-03 20:20:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718815002] [2024-06-03 20:20:07,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718815002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:07,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:07,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863031417] [2024-06-03 20:20:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:07,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:07,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:07,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:08,123 INFO L124 PetriNetUnfolderBase]: 2369/3711 cut-off events. [2024-06-03 20:20:08,123 INFO L125 PetriNetUnfolderBase]: For 303509/303509 co-relation queries the response was YES. [2024-06-03 20:20:08,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29077 conditions, 3711 events. 2369/3711 cut-off events. For 303509/303509 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20084 event pairs, 605 based on Foata normal form. 20/3728 useless extension candidates. Maximal degree in co-relation 28979. Up to 3349 conditions per place. [2024-06-03 20:20:08,160 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2024-06-03 20:20:08,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 310 transitions, 3674 flow [2024-06-03 20:20:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:20:08,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 20:20:08,161 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 2910 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:20:08,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 310 transitions, 3674 flow [2024-06-03 20:20:08,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 310 transitions, 3572 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:08,648 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 2863 flow [2024-06-03 20:20:08,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2863, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2024-06-03 20:20:08,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-03 20:20:08,649 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 2863 flow [2024-06-03 20:20:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:08,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:08,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:20:08,650 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:08,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1445424145, now seen corresponding path program 4 times [2024-06-03 20:20:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:08,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56554535] [2024-06-03 20:20:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56554535] [2024-06-03 20:20:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56554535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182340435] [2024-06-03 20:20:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:10,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 2863 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:10,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:10,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:11,085 INFO L124 PetriNetUnfolderBase]: 2538/4001 cut-off events. [2024-06-03 20:20:11,086 INFO L125 PetriNetUnfolderBase]: For 332382/332385 co-relation queries the response was YES. [2024-06-03 20:20:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31538 conditions, 4001 events. 2538/4001 cut-off events. For 332382/332385 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22189 event pairs, 562 based on Foata normal form. 16/4013 useless extension candidates. Maximal degree in co-relation 31439. Up to 3137 conditions per place. [2024-06-03 20:20:11,124 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-03 20:20:11,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 322 transitions, 3949 flow [2024-06-03 20:20:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 20:20:11,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-03 20:20:11,126 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 2863 flow. Second operand 9 states and 184 transitions. [2024-06-03 20:20:11,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 322 transitions, 3949 flow [2024-06-03 20:20:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 322 transitions, 3896 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:11,655 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 3026 flow [2024-06-03 20:20:11,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3026, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-06-03 20:20:11,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-03 20:20:11,656 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 3026 flow [2024-06-03 20:20:11,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:11,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:11,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:20:11,656 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:11,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1440662545, now seen corresponding path program 5 times [2024-06-03 20:20:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:11,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060493963] [2024-06-03 20:20:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:13,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:13,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060493963] [2024-06-03 20:20:13,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060493963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:13,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:13,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009400433] [2024-06-03 20:20:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:13,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 3026 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:13,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:14,312 INFO L124 PetriNetUnfolderBase]: 2613/4131 cut-off events. [2024-06-03 20:20:14,312 INFO L125 PetriNetUnfolderBase]: For 353649/353652 co-relation queries the response was YES. [2024-06-03 20:20:14,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32847 conditions, 4131 events. 2613/4131 cut-off events. For 353649/353652 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23207 event pairs, 592 based on Foata normal form. 20/4147 useless extension candidates. Maximal degree in co-relation 32747. Up to 3461 conditions per place. [2024-06-03 20:20:14,355 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 252 selfloop transitions, 60 changer transitions 0/317 dead transitions. [2024-06-03 20:20:14,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 317 transitions, 3858 flow [2024-06-03 20:20:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 20:20:14,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-03 20:20:14,357 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 3026 flow. Second operand 9 states and 179 transitions. [2024-06-03 20:20:14,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 317 transitions, 3858 flow [2024-06-03 20:20:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 317 transitions, 3744 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:14,999 INFO L231 Difference]: Finished difference. Result has 211 places, 275 transitions, 3085 flow [2024-06-03 20:20:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=211, PETRI_TRANSITIONS=275} [2024-06-03 20:20:14,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-03 20:20:14,999 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 275 transitions, 3085 flow [2024-06-03 20:20:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:15,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:15,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:15,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:20:15,000 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:15,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1811015823, now seen corresponding path program 6 times [2024-06-03 20:20:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:15,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316871537] [2024-06-03 20:20:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:15,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316871537] [2024-06-03 20:20:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316871537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:16,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:16,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872060870] [2024-06-03 20:20:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:16,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:16,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:16,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 275 transitions, 3085 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:16,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:16,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:17,702 INFO L124 PetriNetUnfolderBase]: 2577/4075 cut-off events. [2024-06-03 20:20:17,703 INFO L125 PetriNetUnfolderBase]: For 337872/337875 co-relation queries the response was YES. [2024-06-03 20:20:17,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31660 conditions, 4075 events. 2577/4075 cut-off events. For 337872/337875 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22831 event pairs, 574 based on Foata normal form. 20/4091 useless extension candidates. Maximal degree in co-relation 31558. Up to 3405 conditions per place. [2024-06-03 20:20:17,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 60 changer transitions 0/315 dead transitions. [2024-06-03 20:20:17,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 315 transitions, 3863 flow [2024-06-03 20:20:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:20:17,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-03 20:20:17,747 INFO L175 Difference]: Start difference. First operand has 211 places, 275 transitions, 3085 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:20:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 315 transitions, 3863 flow [2024-06-03 20:20:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 315 transitions, 3708 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:18,417 INFO L231 Difference]: Finished difference. Result has 213 places, 275 transitions, 3057 flow [2024-06-03 20:20:18,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3057, PETRI_PLACES=213, PETRI_TRANSITIONS=275} [2024-06-03 20:20:18,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-03 20:20:18,417 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 275 transitions, 3057 flow [2024-06-03 20:20:18,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:18,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:18,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:20:18,418 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:18,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 679204623, now seen corresponding path program 1 times [2024-06-03 20:20:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:18,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796524739] [2024-06-03 20:20:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:19,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:19,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796524739] [2024-06-03 20:20:19,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796524739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:19,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:19,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593658621] [2024-06-03 20:20:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:19,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:19,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:19,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:19,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:19,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 275 transitions, 3057 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:19,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:19,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:19,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:20,944 INFO L124 PetriNetUnfolderBase]: 2618/4141 cut-off events. [2024-06-03 20:20:20,944 INFO L125 PetriNetUnfolderBase]: For 337582/337585 co-relation queries the response was YES. [2024-06-03 20:20:20,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31985 conditions, 4141 events. 2618/4141 cut-off events. For 337582/337585 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23410 event pairs, 570 based on Foata normal form. 12/4149 useless extension candidates. Maximal degree in co-relation 31882. Up to 3149 conditions per place. [2024-06-03 20:20:20,991 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 64 changer transitions 0/318 dead transitions. [2024-06-03 20:20:20,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 3905 flow [2024-06-03 20:20:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:20:20,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 20:20:20,992 INFO L175 Difference]: Start difference. First operand has 213 places, 275 transitions, 3057 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:20:20,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 3905 flow [2024-06-03 20:20:21,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 318 transitions, 3775 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:21,749 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3107 flow [2024-06-03 20:20:21,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3107, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-06-03 20:20:21,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-03 20:20:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3107 flow [2024-06-03 20:20:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:21,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:21,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:20:21,750 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 102692170, now seen corresponding path program 1 times [2024-06-03 20:20:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:21,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532935324] [2024-06-03 20:20:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532935324] [2024-06-03 20:20:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532935324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:22,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:22,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:22,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349666614] [2024-06-03 20:20:22,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:22,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:22,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:22,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:22,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3107 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:22,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:22,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:22,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:23,497 INFO L124 PetriNetUnfolderBase]: 2623/4153 cut-off events. [2024-06-03 20:20:23,497 INFO L125 PetriNetUnfolderBase]: For 335734/335737 co-relation queries the response was YES. [2024-06-03 20:20:23,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32260 conditions, 4153 events. 2623/4153 cut-off events. For 335734/335737 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23390 event pairs, 712 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 32156. Up to 3889 conditions per place. [2024-06-03 20:20:23,544 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 31 changer transitions 0/298 dead transitions. [2024-06-03 20:20:23,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 298 transitions, 3809 flow [2024-06-03 20:20:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:20:23,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:20:23,552 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3107 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:20:23,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 298 transitions, 3809 flow [2024-06-03 20:20:24,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 298 transitions, 3651 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:24,213 INFO L231 Difference]: Finished difference. Result has 214 places, 279 transitions, 3077 flow [2024-06-03 20:20:24,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3077, PETRI_PLACES=214, PETRI_TRANSITIONS=279} [2024-06-03 20:20:24,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-03 20:20:24,214 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 279 transitions, 3077 flow [2024-06-03 20:20:24,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:24,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:24,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:24,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:20:24,215 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:24,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:24,215 INFO L85 PathProgramCache]: Analyzing trace with hash -543543855, now seen corresponding path program 7 times [2024-06-03 20:20:24,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:24,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348733342] [2024-06-03 20:20:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:24,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:25,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:25,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348733342] [2024-06-03 20:20:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348733342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:25,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:25,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513579377] [2024-06-03 20:20:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:25,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:25,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 279 transitions, 3077 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:25,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:25,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:25,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:26,681 INFO L124 PetriNetUnfolderBase]: 2698/4266 cut-off events. [2024-06-03 20:20:26,682 INFO L125 PetriNetUnfolderBase]: For 370910/370910 co-relation queries the response was YES. [2024-06-03 20:20:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32872 conditions, 4266 events. 2698/4266 cut-off events. For 370910/370910 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24246 event pairs, 592 based on Foata normal form. 20/4271 useless extension candidates. Maximal degree in co-relation 32767. Up to 3608 conditions per place. [2024-06-03 20:20:26,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 61 changer transitions 0/316 dead transitions. [2024-06-03 20:20:26,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 316 transitions, 3891 flow [2024-06-03 20:20:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:20:26,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 20:20:26,733 INFO L175 Difference]: Start difference. First operand has 214 places, 279 transitions, 3077 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:20:26,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 316 transitions, 3891 flow [2024-06-03 20:20:27,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 3821 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:27,372 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3184 flow [2024-06-03 20:20:27,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3184, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-03 20:20:27,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-03 20:20:27,374 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3184 flow [2024-06-03 20:20:27,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:27,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:27,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:27,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:20:27,375 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:27,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash 53783535, now seen corresponding path program 8 times [2024-06-03 20:20:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:27,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600088825] [2024-06-03 20:20:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:27,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:28,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:28,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600088825] [2024-06-03 20:20:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600088825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:28,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:28,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:28,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091277545] [2024-06-03 20:20:28,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:28,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3184 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:29,929 INFO L124 PetriNetUnfolderBase]: 2773/4401 cut-off events. [2024-06-03 20:20:29,929 INFO L125 PetriNetUnfolderBase]: For 377963/377963 co-relation queries the response was YES. [2024-06-03 20:20:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34038 conditions, 4401 events. 2773/4401 cut-off events. For 377963/377963 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25311 event pairs, 607 based on Foata normal form. 20/4406 useless extension candidates. Maximal degree in co-relation 33933. Up to 3733 conditions per place. [2024-06-03 20:20:29,973 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 59 changer transitions 0/319 dead transitions. [2024-06-03 20:20:29,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 319 transitions, 4012 flow [2024-06-03 20:20:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:20:29,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 20:20:29,974 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3184 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:20:29,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 319 transitions, 4012 flow [2024-06-03 20:20:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 319 transitions, 3863 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:30,611 INFO L231 Difference]: Finished difference. Result has 219 places, 281 transitions, 3210 flow [2024-06-03 20:20:30,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=219, PETRI_TRANSITIONS=281} [2024-06-03 20:20:30,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-03 20:20:30,612 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 281 transitions, 3210 flow [2024-06-03 20:20:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:30,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:30,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:30,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:20:30,613 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:30,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:30,613 INFO L85 PathProgramCache]: Analyzing trace with hash -174295245, now seen corresponding path program 9 times [2024-06-03 20:20:30,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:30,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485364768] [2024-06-03 20:20:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:30,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:31,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485364768] [2024-06-03 20:20:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485364768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239958965] [2024-06-03 20:20:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:31,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 281 transitions, 3210 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:31,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:31,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:31,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:33,074 INFO L124 PetriNetUnfolderBase]: 2892/4607 cut-off events. [2024-06-03 20:20:33,075 INFO L125 PetriNetUnfolderBase]: For 404458/404458 co-relation queries the response was YES. [2024-06-03 20:20:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36031 conditions, 4607 events. 2892/4607 cut-off events. For 404458/404458 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26801 event pairs, 626 based on Foata normal form. 16/4608 useless extension candidates. Maximal degree in co-relation 35925. Up to 3510 conditions per place. [2024-06-03 20:20:33,124 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-03 20:20:33,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 327 transitions, 4334 flow [2024-06-03 20:20:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 20:20:33,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-03 20:20:33,125 INFO L175 Difference]: Start difference. First operand has 219 places, 281 transitions, 3210 flow. Second operand 9 states and 178 transitions. [2024-06-03 20:20:33,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 327 transitions, 4334 flow [2024-06-03 20:20:33,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4187 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:33,805 INFO L231 Difference]: Finished difference. Result has 221 places, 283 transitions, 3301 flow [2024-06-03 20:20:33,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3301, PETRI_PLACES=221, PETRI_TRANSITIONS=283} [2024-06-03 20:20:33,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-03 20:20:33,805 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 283 transitions, 3301 flow [2024-06-03 20:20:33,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:33,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:33,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:33,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:20:33,806 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:33,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash 485756211, now seen corresponding path program 10 times [2024-06-03 20:20:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663719536] [2024-06-03 20:20:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:33,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:35,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:35,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663719536] [2024-06-03 20:20:35,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663719536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:35,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:35,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083349202] [2024-06-03 20:20:35,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:35,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:35,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:35,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 283 transitions, 3301 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:35,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:35,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:35,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:36,274 INFO L124 PetriNetUnfolderBase]: 2856/4546 cut-off events. [2024-06-03 20:20:36,274 INFO L125 PetriNetUnfolderBase]: For 391126/391126 co-relation queries the response was YES. [2024-06-03 20:20:36,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34596 conditions, 4546 events. 2856/4546 cut-off events. For 391126/391126 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26407 event pairs, 628 based on Foata normal form. 20/4551 useless extension candidates. Maximal degree in co-relation 34489. Up to 3878 conditions per place. [2024-06-03 20:20:36,325 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 61 changer transitions 0/321 dead transitions. [2024-06-03 20:20:36,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 321 transitions, 4085 flow [2024-06-03 20:20:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:20:36,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 20:20:36,327 INFO L175 Difference]: Start difference. First operand has 221 places, 283 transitions, 3301 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:20:36,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 321 transitions, 4085 flow [2024-06-03 20:20:37,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 321 transitions, 3945 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:37,271 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3290 flow [2024-06-03 20:20:37,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3290, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-03 20:20:37,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-03 20:20:37,272 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3290 flow [2024-06-03 20:20:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2024-06-03 20:20:37,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:37,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:20:37,272 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:37,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 62361359, now seen corresponding path program 2 times [2024-06-03 20:20:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452218157] [2024-06-03 20:20:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:38,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452218157] [2024-06-03 20:20:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452218157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:38,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:38,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284278856] [2024-06-03 20:20:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:38,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:38,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:38,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:38,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3290 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:38,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:38,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:38,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:40,128 INFO L124 PetriNetUnfolderBase]: 2897/4627 cut-off events. [2024-06-03 20:20:40,129 INFO L125 PetriNetUnfolderBase]: For 385807/385807 co-relation queries the response was YES. [2024-06-03 20:20:40,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34995 conditions, 4627 events. 2897/4627 cut-off events. For 385807/385807 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27116 event pairs, 633 based on Foata normal form. 12/4624 useless extension candidates. Maximal degree in co-relation 34886. Up to 3742 conditions per place. [2024-06-03 20:20:40,175 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 62 changer transitions 0/324 dead transitions. [2024-06-03 20:20:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 324 transitions, 4152 flow [2024-06-03 20:20:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 20:20:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 20:20:40,177 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3290 flow. Second operand 9 states and 174 transitions. [2024-06-03 20:20:40,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 324 transitions, 4152 flow [2024-06-03 20:20:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 324 transitions, 4015 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:40,908 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3337 flow [2024-06-03 20:20:40,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3337, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-03 20:20:40,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-03 20:20:40,909 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3337 flow [2024-06-03 20:20:40,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:40,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:40,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:40,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:20:40,909 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash 960044849, now seen corresponding path program 3 times [2024-06-03 20:20:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:40,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143048955] [2024-06-03 20:20:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:40,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:42,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143048955] [2024-06-03 20:20:42,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143048955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:42,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:42,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:42,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947640195] [2024-06-03 20:20:42,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:42,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:42,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:42,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:42,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3337 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:42,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:42,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:42,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:43,976 INFO L124 PetriNetUnfolderBase]: 2938/4708 cut-off events. [2024-06-03 20:20:43,976 INFO L125 PetriNetUnfolderBase]: For 400803/400803 co-relation queries the response was YES. [2024-06-03 20:20:44,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 4708 events. 2938/4708 cut-off events. For 400803/400803 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27824 event pairs, 648 based on Foata normal form. 12/4705 useless extension candidates. Maximal degree in co-relation 35573. Up to 3933 conditions per place. [2024-06-03 20:20:44,031 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 63 changer transitions 0/323 dead transitions. [2024-06-03 20:20:44,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 323 transitions, 4193 flow [2024-06-03 20:20:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:20:44,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 20:20:44,032 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3337 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:20:44,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 323 transitions, 4193 flow [2024-06-03 20:20:44,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 323 transitions, 4031 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:44,745 INFO L231 Difference]: Finished difference. Result has 228 places, 285 transitions, 3363 flow [2024-06-03 20:20:44,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3363, PETRI_PLACES=228, PETRI_TRANSITIONS=285} [2024-06-03 20:20:44,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-03 20:20:44,746 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 285 transitions, 3363 flow [2024-06-03 20:20:44,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:44,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:44,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:20:44,746 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:44,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1260201315, now seen corresponding path program 4 times [2024-06-03 20:20:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:44,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685203795] [2024-06-03 20:20:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:44,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685203795] [2024-06-03 20:20:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685203795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:46,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085312347] [2024-06-03 20:20:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:46,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:46,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 285 transitions, 3363 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:46,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:46,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:46,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:47,582 INFO L124 PetriNetUnfolderBase]: 2918/4676 cut-off events. [2024-06-03 20:20:47,582 INFO L125 PetriNetUnfolderBase]: For 391097/391097 co-relation queries the response was YES. [2024-06-03 20:20:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34736 conditions, 4676 events. 2918/4676 cut-off events. For 391097/391097 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27594 event pairs, 594 based on Foata normal form. 12/4673 useless extension candidates. Maximal degree in co-relation 34625. Up to 3017 conditions per place. [2024-06-03 20:20:47,626 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 242 selfloop transitions, 75 changer transitions 0/322 dead transitions. [2024-06-03 20:20:47,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 4079 flow [2024-06-03 20:20:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:20:47,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 20:20:47,628 INFO L175 Difference]: Start difference. First operand has 228 places, 285 transitions, 3363 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:20:47,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 4079 flow [2024-06-03 20:20:48,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 3913 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:48,319 INFO L231 Difference]: Finished difference. Result has 229 places, 284 transitions, 3267 flow [2024-06-03 20:20:48,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3267, PETRI_PLACES=229, PETRI_TRANSITIONS=284} [2024-06-03 20:20:48,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-03 20:20:48,319 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 284 transitions, 3267 flow [2024-06-03 20:20:48,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:48,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:48,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:20:48,320 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:48,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1128008244, now seen corresponding path program 2 times [2024-06-03 20:20:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:48,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975564191] [2024-06-03 20:20:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:48,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:49,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:49,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975564191] [2024-06-03 20:20:49,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975564191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:49,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:49,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346735813] [2024-06-03 20:20:49,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:49,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:49,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:49,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 284 transitions, 3267 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:49,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:49,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:50,350 INFO L124 PetriNetUnfolderBase]: 2915/4675 cut-off events. [2024-06-03 20:20:50,350 INFO L125 PetriNetUnfolderBase]: For 380677/380677 co-relation queries the response was YES. [2024-06-03 20:20:50,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34716 conditions, 4675 events. 2915/4675 cut-off events. For 380677/380677 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27585 event pairs, 794 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 34604. Up to 4390 conditions per place. [2024-06-03 20:20:50,394 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 265 selfloop transitions, 31 changer transitions 0/301 dead transitions. [2024-06-03 20:20:50,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 301 transitions, 3919 flow [2024-06-03 20:20:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:20:50,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 20:20:50,396 INFO L175 Difference]: Start difference. First operand has 229 places, 284 transitions, 3267 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:20:50,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 301 transitions, 3919 flow [2024-06-03 20:20:51,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 301 transitions, 3611 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-03 20:20:51,101 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3031 flow [2024-06-03 20:20:51,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3031, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-03 20:20:51,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-03 20:20:51,103 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3031 flow [2024-06-03 20:20:51,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:51,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:51,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:20:51,104 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1397841234, now seen corresponding path program 3 times [2024-06-03 20:20:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315098590] [2024-06-03 20:20:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:51,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315098590] [2024-06-03 20:20:51,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315098590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846725906] [2024-06-03 20:20:51,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:52,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:52,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3031 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:52,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:52,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:52,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:53,090 INFO L124 PetriNetUnfolderBase]: 2905/4661 cut-off events. [2024-06-03 20:20:53,090 INFO L125 PetriNetUnfolderBase]: For 383579/383579 co-relation queries the response was YES. [2024-06-03 20:20:53,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33386 conditions, 4661 events. 2905/4661 cut-off events. For 383579/383579 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27517 event pairs, 790 based on Foata normal form. 2/4654 useless extension candidates. Maximal degree in co-relation 33276. Up to 4302 conditions per place. [2024-06-03 20:20:53,141 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 51 changer transitions 0/299 dead transitions. [2024-06-03 20:20:53,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 299 transitions, 3671 flow [2024-06-03 20:20:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:20:53,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 20:20:53,143 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3031 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:20:53,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 299 transitions, 3671 flow [2024-06-03 20:20:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 299 transitions, 3576 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:54,058 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3052 flow [2024-06-03 20:20:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-03 20:20:54,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-03 20:20:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3052 flow [2024-06-03 20:20:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:20:54,060 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:54,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1461533141, now seen corresponding path program 1 times [2024-06-03 20:20:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050582980] [2024-06-03 20:20:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:55,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050582980] [2024-06-03 20:20:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050582980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:55,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255544253] [2024-06-03 20:20:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:55,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:55,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3052 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:55,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:55,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:55,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:56,067 INFO L124 PetriNetUnfolderBase]: 3021/4837 cut-off events. [2024-06-03 20:20:56,067 INFO L125 PetriNetUnfolderBase]: For 412275/412275 co-relation queries the response was YES. [2024-06-03 20:20:56,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35087 conditions, 4837 events. 3021/4837 cut-off events. For 412275/412275 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28678 event pairs, 815 based on Foata normal form. 2/4830 useless extension candidates. Maximal degree in co-relation 34978. Up to 4404 conditions per place. [2024-06-03 20:20:56,122 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 49 changer transitions 0/309 dead transitions. [2024-06-03 20:20:56,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 3985 flow [2024-06-03 20:20:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:20:56,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 20:20:56,123 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3052 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:20:56,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 3985 flow [2024-06-03 20:20:57,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 3849 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:57,065 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 3128 flow [2024-06-03 20:20:57,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3128, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2024-06-03 20:20:57,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-03 20:20:57,065 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 3128 flow [2024-06-03 20:20:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:57,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:57,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:57,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:20:57,066 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1462067891, now seen corresponding path program 2 times [2024-06-03 20:20:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892601630] [2024-06-03 20:20:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:57,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:57,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892601630] [2024-06-03 20:20:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892601630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:57,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:57,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888684628] [2024-06-03 20:20:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:57,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:57,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:57,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:20:57,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 3128 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:57,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:57,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:20:57,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:58,955 INFO L124 PetriNetUnfolderBase]: 3047/4879 cut-off events. [2024-06-03 20:20:58,955 INFO L125 PetriNetUnfolderBase]: For 432692/432692 co-relation queries the response was YES. [2024-06-03 20:20:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35316 conditions, 4879 events. 3047/4879 cut-off events. For 432692/432692 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28963 event pairs, 824 based on Foata normal form. 14/4884 useless extension candidates. Maximal degree in co-relation 35206. Up to 4547 conditions per place. [2024-06-03 20:20:59,007 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 253 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-03 20:20:59,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 308 transitions, 3851 flow [2024-06-03 20:20:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:20:59,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 20:20:59,009 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 3128 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:20:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 308 transitions, 3851 flow [2024-06-03 20:20:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 308 transitions, 3761 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:59,963 INFO L231 Difference]: Finished difference. Result has 233 places, 291 transitions, 3193 flow [2024-06-03 20:20:59,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=233, PETRI_TRANSITIONS=291} [2024-06-03 20:20:59,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-03 20:20:59,964 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 291 transitions, 3193 flow [2024-06-03 20:20:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:20:59,965 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:59,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -883151087, now seen corresponding path program 1 times [2024-06-03 20:20:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367731611] [2024-06-03 20:20:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367731611] [2024-06-03 20:21:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367731611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:01,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189861867] [2024-06-03 20:21:01,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:01,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:01,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 291 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:01,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:02,151 INFO L124 PetriNetUnfolderBase]: 3103/4961 cut-off events. [2024-06-03 20:21:02,152 INFO L125 PetriNetUnfolderBase]: For 428322/428322 co-relation queries the response was YES. [2024-06-03 20:21:02,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 4961 events. 3103/4961 cut-off events. For 428322/428322 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29517 event pairs, 747 based on Foata normal form. 4/4956 useless extension candidates. Maximal degree in co-relation 36367. Up to 4543 conditions per place. [2024-06-03 20:21:02,207 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 44 changer transitions 0/320 dead transitions. [2024-06-03 20:21:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4167 flow [2024-06-03 20:21:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:21:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 20:21:02,209 INFO L175 Difference]: Start difference. First operand has 233 places, 291 transitions, 3193 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:21:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4167 flow [2024-06-03 20:21:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 320 transitions, 4035 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:03,225 INFO L231 Difference]: Finished difference. Result has 235 places, 299 transitions, 3316 flow [2024-06-03 20:21:03,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=235, PETRI_TRANSITIONS=299} [2024-06-03 20:21:03,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-03 20:21:03,225 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 299 transitions, 3316 flow [2024-06-03 20:21:03,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:03,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:03,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:21:03,226 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:03,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1397856889, now seen corresponding path program 2 times [2024-06-03 20:21:03,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:03,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239713010] [2024-06-03 20:21:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:04,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239713010] [2024-06-03 20:21:04,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239713010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:04,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:04,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:04,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50423210] [2024-06-03 20:21:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:04,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:04,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:04,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 299 transitions, 3316 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:04,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:04,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:04,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:05,556 INFO L124 PetriNetUnfolderBase]: 3187/5078 cut-off events. [2024-06-03 20:21:05,556 INFO L125 PetriNetUnfolderBase]: For 464727/464727 co-relation queries the response was YES. [2024-06-03 20:21:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38588 conditions, 5078 events. 3187/5078 cut-off events. For 464727/464727 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30214 event pairs, 737 based on Foata normal form. 4/5073 useless extension candidates. Maximal degree in co-relation 38474. Up to 4484 conditions per place. [2024-06-03 20:21:05,616 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 79 changer transitions 0/333 dead transitions. [2024-06-03 20:21:05,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 333 transitions, 4558 flow [2024-06-03 20:21:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:21:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 20:21:05,618 INFO L175 Difference]: Start difference. First operand has 235 places, 299 transitions, 3316 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:21:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 333 transitions, 4558 flow [2024-06-03 20:21:06,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 333 transitions, 4429 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:06,892 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 3642 flow [2024-06-03 20:21:06,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-03 20:21:06,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-03 20:21:06,893 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 3642 flow [2024-06-03 20:21:06,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:06,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:06,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:06,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:21:06,893 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:06,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash -883006937, now seen corresponding path program 3 times [2024-06-03 20:21:06,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:06,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318914868] [2024-06-03 20:21:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:08,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318914868] [2024-06-03 20:21:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318914868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:08,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658304591] [2024-06-03 20:21:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:08,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:08,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:08,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 3642 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:09,343 INFO L124 PetriNetUnfolderBase]: 3179/5067 cut-off events. [2024-06-03 20:21:09,343 INFO L125 PetriNetUnfolderBase]: For 470275/470275 co-relation queries the response was YES. [2024-06-03 20:21:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 5067 events. 3179/5067 cut-off events. For 470275/470275 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30176 event pairs, 753 based on Foata normal form. 4/5062 useless extension candidates. Maximal degree in co-relation 39000. Up to 4481 conditions per place. [2024-06-03 20:21:09,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 73 changer transitions 0/332 dead transitions. [2024-06-03 20:21:09,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 332 transitions, 4646 flow [2024-06-03 20:21:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:21:09,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 20:21:09,408 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 3642 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:21:09,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 332 transitions, 4646 flow [2024-06-03 20:21:10,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 332 transitions, 4459 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 20:21:10,434 INFO L231 Difference]: Finished difference. Result has 245 places, 311 transitions, 3609 flow [2024-06-03 20:21:10,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3455, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=245, PETRI_TRANSITIONS=311} [2024-06-03 20:21:10,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-03 20:21:10,435 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 311 transitions, 3609 flow [2024-06-03 20:21:10,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:10,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:10,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:10,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:21:10,436 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:10,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1541957165, now seen corresponding path program 1 times [2024-06-03 20:21:10,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:10,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784533983] [2024-06-03 20:21:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:10,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784533983] [2024-06-03 20:21:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784533983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306523385] [2024-06-03 20:21:11,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:11,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:11,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:11,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:11,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 311 transitions, 3609 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:11,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:11,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:12,582 INFO L124 PetriNetUnfolderBase]: 3231/5146 cut-off events. [2024-06-03 20:21:12,583 INFO L125 PetriNetUnfolderBase]: For 492687/492687 co-relation queries the response was YES. [2024-06-03 20:21:12,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39387 conditions, 5146 events. 3231/5146 cut-off events. For 492687/492687 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30641 event pairs, 844 based on Foata normal form. 8/5142 useless extension candidates. Maximal degree in co-relation 39268. Up to 4757 conditions per place. [2024-06-03 20:21:12,643 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 49 changer transitions 0/338 dead transitions. [2024-06-03 20:21:12,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 338 transitions, 4459 flow [2024-06-03 20:21:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:21:12,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 20:21:12,644 INFO L175 Difference]: Start difference. First operand has 245 places, 311 transitions, 3609 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:21:12,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 338 transitions, 4459 flow [2024-06-03 20:21:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 338 transitions, 4236 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:21:13,833 INFO L231 Difference]: Finished difference. Result has 247 places, 318 transitions, 3627 flow [2024-06-03 20:21:13,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3627, PETRI_PLACES=247, PETRI_TRANSITIONS=318} [2024-06-03 20:21:13,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-03 20:21:13,834 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 318 transitions, 3627 flow [2024-06-03 20:21:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:13,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:21:13,835 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:13,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1727759653, now seen corresponding path program 4 times [2024-06-03 20:21:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792046798] [2024-06-03 20:21:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792046798] [2024-06-03 20:21:15,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792046798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:15,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93477850] [2024-06-03 20:21:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:15,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:15,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 318 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:15,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:15,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:15,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:16,225 INFO L124 PetriNetUnfolderBase]: 3283/5221 cut-off events. [2024-06-03 20:21:16,225 INFO L125 PetriNetUnfolderBase]: For 510889/510892 co-relation queries the response was YES. [2024-06-03 20:21:16,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40262 conditions, 5221 events. 3283/5221 cut-off events. For 510889/510892 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31212 event pairs, 808 based on Foata normal form. 4/5214 useless extension candidates. Maximal degree in co-relation 40143. Up to 4425 conditions per place. [2024-06-03 20:21:16,285 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 252 selfloop transitions, 96 changer transitions 0/353 dead transitions. [2024-06-03 20:21:16,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 353 transitions, 5115 flow [2024-06-03 20:21:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:21:16,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 20:21:16,287 INFO L175 Difference]: Start difference. First operand has 247 places, 318 transitions, 3627 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:21:16,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 353 transitions, 5115 flow [2024-06-03 20:21:17,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 353 transitions, 4948 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:17,343 INFO L231 Difference]: Finished difference. Result has 251 places, 330 transitions, 3960 flow [2024-06-03 20:21:17,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3960, PETRI_PLACES=251, PETRI_TRANSITIONS=330} [2024-06-03 20:21:17,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-03 20:21:17,344 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 330 transitions, 3960 flow [2024-06-03 20:21:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:17,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:17,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:21:17,345 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1471172337, now seen corresponding path program 5 times [2024-06-03 20:21:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:17,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042538927] [2024-06-03 20:21:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:17,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:18,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042538927] [2024-06-03 20:21:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042538927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665923527] [2024-06-03 20:21:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:18,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:18,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:18,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:18,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 330 transitions, 3960 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:18,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:18,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:18,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:19,838 INFO L124 PetriNetUnfolderBase]: 3275/5209 cut-off events. [2024-06-03 20:21:19,842 INFO L125 PetriNetUnfolderBase]: For 516700/516703 co-relation queries the response was YES. [2024-06-03 20:21:19,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40732 conditions, 5209 events. 3275/5209 cut-off events. For 516700/516703 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31154 event pairs, 810 based on Foata normal form. 4/5202 useless extension candidates. Maximal degree in co-relation 40610. Up to 4422 conditions per place. [2024-06-03 20:21:19,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 95 changer transitions 0/350 dead transitions. [2024-06-03 20:21:19,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 350 transitions, 5044 flow [2024-06-03 20:21:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:21:19,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 20:21:19,912 INFO L175 Difference]: Start difference. First operand has 251 places, 330 transitions, 3960 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:21:19,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 350 transitions, 5044 flow [2024-06-03 20:21:21,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 350 transitions, 4849 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-03 20:21:21,143 INFO L231 Difference]: Finished difference. Result has 257 places, 330 transitions, 3963 flow [2024-06-03 20:21:21,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3963, PETRI_PLACES=257, PETRI_TRANSITIONS=330} [2024-06-03 20:21:21,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-03 20:21:21,143 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 330 transitions, 3963 flow [2024-06-03 20:21:21,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:21,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:21,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:21,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:21:21,144 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:21,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1892539123, now seen corresponding path program 2 times [2024-06-03 20:21:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:21,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129558945] [2024-06-03 20:21:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:22,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129558945] [2024-06-03 20:21:22,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129558945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:22,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:22,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095704459] [2024-06-03 20:21:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:22,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:22,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 330 transitions, 3963 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:22,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:22,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:22,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:23,493 INFO L124 PetriNetUnfolderBase]: 3327/5285 cut-off events. [2024-06-03 20:21:23,493 INFO L125 PetriNetUnfolderBase]: For 542138/542141 co-relation queries the response was YES. [2024-06-03 20:21:23,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41574 conditions, 5285 events. 3327/5285 cut-off events. For 542138/542141 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31611 event pairs, 859 based on Foata normal form. 8/5282 useless extension candidates. Maximal degree in co-relation 41450. Up to 4654 conditions per place. [2024-06-03 20:21:23,556 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 100 changer transitions 0/356 dead transitions. [2024-06-03 20:21:23,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 356 transitions, 5015 flow [2024-06-03 20:21:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:21:23,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 20:21:23,558 INFO L175 Difference]: Start difference. First operand has 257 places, 330 transitions, 3963 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:21:23,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 356 transitions, 5015 flow [2024-06-03 20:21:24,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 356 transitions, 4841 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:24,848 INFO L231 Difference]: Finished difference. Result has 262 places, 337 transitions, 4146 flow [2024-06-03 20:21:24,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4146, PETRI_PLACES=262, PETRI_TRANSITIONS=337} [2024-06-03 20:21:24,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-03 20:21:24,849 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 337 transitions, 4146 flow [2024-06-03 20:21:24,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:24,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:24,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:24,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:21:24,849 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:24,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1471057333, now seen corresponding path program 6 times [2024-06-03 20:21:24,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396726419] [2024-06-03 20:21:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:26,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396726419] [2024-06-03 20:21:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396726419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:26,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246307400] [2024-06-03 20:21:26,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:26,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:26,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:26,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 337 transitions, 4146 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:26,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:26,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:26,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:27,313 INFO L124 PetriNetUnfolderBase]: 3367/5332 cut-off events. [2024-06-03 20:21:27,313 INFO L125 PetriNetUnfolderBase]: For 558148/558151 co-relation queries the response was YES. [2024-06-03 20:21:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42330 conditions, 5332 events. 3367/5332 cut-off events. For 558148/558151 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31818 event pairs, 800 based on Foata normal form. 8/5329 useless extension candidates. Maximal degree in co-relation 42204. Up to 4296 conditions per place. [2024-06-03 20:21:27,380 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 227 selfloop transitions, 139 changer transitions 0/371 dead transitions. [2024-06-03 20:21:27,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 371 transitions, 5554 flow [2024-06-03 20:21:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:21:27,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 20:21:27,382 INFO L175 Difference]: Start difference. First operand has 262 places, 337 transitions, 4146 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:21:27,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 371 transitions, 5554 flow [2024-06-03 20:21:28,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 371 transitions, 5262 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:28,552 INFO L231 Difference]: Finished difference. Result has 264 places, 351 transitions, 4463 flow [2024-06-03 20:21:28,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=264, PETRI_TRANSITIONS=351} [2024-06-03 20:21:28,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-03 20:21:28,553 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 351 transitions, 4463 flow [2024-06-03 20:21:28,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:28,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:28,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:21:28,554 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:28,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1471049397, now seen corresponding path program 3 times [2024-06-03 20:21:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943919619] [2024-06-03 20:21:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943919619] [2024-06-03 20:21:29,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943919619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:29,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:29,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930677722] [2024-06-03 20:21:29,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:29,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 351 transitions, 4463 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:30,668 INFO L124 PetriNetUnfolderBase]: 3399/5388 cut-off events. [2024-06-03 20:21:30,668 INFO L125 PetriNetUnfolderBase]: For 575136/575139 co-relation queries the response was YES. [2024-06-03 20:21:30,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43268 conditions, 5388 events. 3399/5388 cut-off events. For 575136/575139 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32232 event pairs, 852 based on Foata normal form. 8/5385 useless extension candidates. Maximal degree in co-relation 43141. Up to 4749 conditions per place. [2024-06-03 20:21:30,736 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 111 changer transitions 0/371 dead transitions. [2024-06-03 20:21:30,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 5359 flow [2024-06-03 20:21:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:21:30,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 20:21:30,738 INFO L175 Difference]: Start difference. First operand has 264 places, 351 transitions, 4463 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:21:30,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 5359 flow [2024-06-03 20:21:32,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 371 transitions, 5180 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-03 20:21:32,076 INFO L231 Difference]: Finished difference. Result has 269 places, 355 transitions, 4644 flow [2024-06-03 20:21:32,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=269, PETRI_TRANSITIONS=355} [2024-06-03 20:21:32,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-03 20:21:32,077 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 355 transitions, 4644 flow [2024-06-03 20:21:32,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:32,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:32,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:32,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:21:32,077 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:32,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1461526197, now seen corresponding path program 4 times [2024-06-03 20:21:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:32,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462270925] [2024-06-03 20:21:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462270925] [2024-06-03 20:21:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462270925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:32,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445218499] [2024-06-03 20:21:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:32,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:32,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 355 transitions, 4644 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:32,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:32,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:32,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:34,151 INFO L124 PetriNetUnfolderBase]: 3457/5482 cut-off events. [2024-06-03 20:21:34,152 INFO L125 PetriNetUnfolderBase]: For 601454/601457 co-relation queries the response was YES. [2024-06-03 20:21:34,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44869 conditions, 5482 events. 3457/5482 cut-off events. For 601454/601457 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 32926 event pairs, 850 based on Foata normal form. 8/5479 useless extension candidates. Maximal degree in co-relation 44740. Up to 4688 conditions per place. [2024-06-03 20:21:34,222 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 252 selfloop transitions, 123 changer transitions 0/380 dead transitions. [2024-06-03 20:21:34,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 380 transitions, 5976 flow [2024-06-03 20:21:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:21:34,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:21:34,223 INFO L175 Difference]: Start difference. First operand has 269 places, 355 transitions, 4644 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:21:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 380 transitions, 5976 flow [2024-06-03 20:21:35,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 380 transitions, 5674 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:35,603 INFO L231 Difference]: Finished difference. Result has 271 places, 361 transitions, 4808 flow [2024-06-03 20:21:35,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=271, PETRI_TRANSITIONS=361} [2024-06-03 20:21:35,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-03 20:21:35,604 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 361 transitions, 4808 flow [2024-06-03 20:21:35,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:35,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:35,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:21:35,605 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:35,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1461852627, now seen corresponding path program 5 times [2024-06-03 20:21:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:35,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923185041] [2024-06-03 20:21:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:36,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923185041] [2024-06-03 20:21:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923185041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:36,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:36,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066609869] [2024-06-03 20:21:36,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:36,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:36,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:36,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:36,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 361 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:36,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:36,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:36,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:37,683 INFO L124 PetriNetUnfolderBase]: 3437/5453 cut-off events. [2024-06-03 20:21:37,684 INFO L125 PetriNetUnfolderBase]: For 593207/593210 co-relation queries the response was YES. [2024-06-03 20:21:37,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44032 conditions, 5453 events. 3437/5453 cut-off events. For 593207/593210 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32758 event pairs, 863 based on Foata normal form. 8/5450 useless extension candidates. Maximal degree in co-relation 43902. Up to 4816 conditions per place. [2024-06-03 20:21:37,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 262 selfloop transitions, 111 changer transitions 0/378 dead transitions. [2024-06-03 20:21:37,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 378 transitions, 5768 flow [2024-06-03 20:21:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:21:37,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:21:37,746 INFO L175 Difference]: Start difference. First operand has 271 places, 361 transitions, 4808 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:21:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 378 transitions, 5768 flow [2024-06-03 20:21:38,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 378 transitions, 5455 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:38,881 INFO L231 Difference]: Finished difference. Result has 275 places, 361 transitions, 4723 flow [2024-06-03 20:21:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=275, PETRI_TRANSITIONS=361} [2024-06-03 20:21:38,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-03 20:21:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 361 transitions, 4723 flow [2024-06-03 20:21:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:38,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:21:38,882 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:38,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1786795930, now seen corresponding path program 1 times [2024-06-03 20:21:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030410742] [2024-06-03 20:21:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:39,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030410742] [2024-06-03 20:21:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030410742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:39,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:39,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672861182] [2024-06-03 20:21:39,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:39,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:39,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:39,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:39,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 361 transitions, 4723 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:39,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:39,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:40,969 INFO L124 PetriNetUnfolderBase]: 3447/5473 cut-off events. [2024-06-03 20:21:40,969 INFO L125 PetriNetUnfolderBase]: For 580615/580615 co-relation queries the response was YES. [2024-06-03 20:21:41,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43993 conditions, 5473 events. 3447/5473 cut-off events. For 580615/580615 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32880 event pairs, 846 based on Foata normal form. 2/5472 useless extension candidates. Maximal degree in co-relation 43861. Up to 5186 conditions per place. [2024-06-03 20:21:41,032 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-03 20:21:41,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 396 transitions, 5696 flow [2024-06-03 20:21:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:21:41,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 20:21:41,034 INFO L175 Difference]: Start difference. First operand has 275 places, 361 transitions, 4723 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:21:41,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 396 transitions, 5696 flow [2024-06-03 20:21:42,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 396 transitions, 5434 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:42,440 INFO L231 Difference]: Finished difference. Result has 278 places, 367 transitions, 4623 flow [2024-06-03 20:21:42,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=278, PETRI_TRANSITIONS=367} [2024-06-03 20:21:42,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-03 20:21:42,441 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 367 transitions, 4623 flow [2024-06-03 20:21:42,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:42,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:42,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:21:42,442 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:42,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1397034274, now seen corresponding path program 2 times [2024-06-03 20:21:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:42,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971426976] [2024-06-03 20:21:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:43,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:43,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971426976] [2024-06-03 20:21:43,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971426976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:43,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:43,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:43,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273116089] [2024-06-03 20:21:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:43,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:43,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:43,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:43,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 367 transitions, 4623 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:43,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:43,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:43,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:44,632 INFO L124 PetriNetUnfolderBase]: 3465/5489 cut-off events. [2024-06-03 20:21:44,633 INFO L125 PetriNetUnfolderBase]: For 593785/593785 co-relation queries the response was YES. [2024-06-03 20:21:44,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44626 conditions, 5489 events. 3465/5489 cut-off events. For 593785/593785 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32793 event pairs, 859 based on Foata normal form. 2/5488 useless extension candidates. Maximal degree in co-relation 44492. Up to 5193 conditions per place. [2024-06-03 20:21:44,694 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 37 changer transitions 0/401 dead transitions. [2024-06-03 20:21:44,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 401 transitions, 5833 flow [2024-06-03 20:21:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:21:44,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 20:21:44,695 INFO L175 Difference]: Start difference. First operand has 278 places, 367 transitions, 4623 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:21:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 401 transitions, 5833 flow [2024-06-03 20:21:46,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 401 transitions, 5719 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:46,197 INFO L231 Difference]: Finished difference. Result has 281 places, 373 transitions, 4752 flow [2024-06-03 20:21:46,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4752, PETRI_PLACES=281, PETRI_TRANSITIONS=373} [2024-06-03 20:21:46,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-03 20:21:46,198 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 373 transitions, 4752 flow [2024-06-03 20:21:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:46,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:46,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:21:46,199 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -833033378, now seen corresponding path program 3 times [2024-06-03 20:21:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775835113] [2024-06-03 20:21:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775835113] [2024-06-03 20:21:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775835113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:46,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:46,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322407845] [2024-06-03 20:21:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:46,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:47,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:47,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 373 transitions, 4752 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:47,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:47,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:47,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:48,382 INFO L124 PetriNetUnfolderBase]: 3475/5506 cut-off events. [2024-06-03 20:21:48,383 INFO L125 PetriNetUnfolderBase]: For 611180/611183 co-relation queries the response was YES. [2024-06-03 20:21:48,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45218 conditions, 5506 events. 3475/5506 cut-off events. For 611180/611183 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32944 event pairs, 855 based on Foata normal form. 2/5504 useless extension candidates. Maximal degree in co-relation 45083. Up to 5115 conditions per place. [2024-06-03 20:21:48,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 353 selfloop transitions, 45 changer transitions 0/403 dead transitions. [2024-06-03 20:21:48,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 403 transitions, 5740 flow [2024-06-03 20:21:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:21:48,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:21:48,442 INFO L175 Difference]: Start difference. First operand has 281 places, 373 transitions, 4752 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:21:48,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 403 transitions, 5740 flow [2024-06-03 20:21:50,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 403 transitions, 5614 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:50,202 INFO L231 Difference]: Finished difference. Result has 285 places, 379 transitions, 4838 flow [2024-06-03 20:21:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4838, PETRI_PLACES=285, PETRI_TRANSITIONS=379} [2024-06-03 20:21:50,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-03 20:21:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 379 transitions, 4838 flow [2024-06-03 20:21:50,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:50,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:50,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:21:50,204 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1111342370, now seen corresponding path program 4 times [2024-06-03 20:21:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024717839] [2024-06-03 20:21:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024717839] [2024-06-03 20:21:51,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024717839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:51,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:51,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:51,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987294988] [2024-06-03 20:21:51,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:51,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:51,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:51,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 379 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:51,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:51,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:51,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:52,548 INFO L124 PetriNetUnfolderBase]: 3485/5527 cut-off events. [2024-06-03 20:21:52,548 INFO L125 PetriNetUnfolderBase]: For 626430/626433 co-relation queries the response was YES. [2024-06-03 20:21:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46106 conditions, 5527 events. 3485/5527 cut-off events. For 626430/626433 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33153 event pairs, 848 based on Foata normal form. 2/5525 useless extension candidates. Maximal degree in co-relation 45968. Up to 5115 conditions per place. [2024-06-03 20:21:52,613 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 50 changer transitions 0/404 dead transitions. [2024-06-03 20:21:52,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 404 transitions, 5814 flow [2024-06-03 20:21:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:21:52,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:21:52,614 INFO L175 Difference]: Start difference. First operand has 285 places, 379 transitions, 4838 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:21:52,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 404 transitions, 5814 flow [2024-06-03 20:21:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 404 transitions, 5680 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:54,570 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4906 flow [2024-06-03 20:21:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4906, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-03 20:21:54,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-03 20:21:54,571 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4906 flow [2024-06-03 20:21:54,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:54,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:54,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:21:54,572 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1369592376, now seen corresponding path program 5 times [2024-06-03 20:21:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005662529] [2024-06-03 20:21:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:55,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:55,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005662529] [2024-06-03 20:21:55,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005662529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:55,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:55,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295454086] [2024-06-03 20:21:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:55,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:55,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:55,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4906 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:55,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:55,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:55,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:56,794 INFO L124 PetriNetUnfolderBase]: 3495/5537 cut-off events. [2024-06-03 20:21:56,794 INFO L125 PetriNetUnfolderBase]: For 642077/642077 co-relation queries the response was YES. [2024-06-03 20:21:56,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46710 conditions, 5537 events. 3495/5537 cut-off events. For 642077/642077 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33126 event pairs, 850 based on Foata normal form. 2/5536 useless extension candidates. Maximal degree in co-relation 46571. Up to 5288 conditions per place. [2024-06-03 20:21:56,859 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 372 selfloop transitions, 25 changer transitions 0/402 dead transitions. [2024-06-03 20:21:56,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 402 transitions, 5856 flow [2024-06-03 20:21:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:21:56,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-03 20:21:56,860 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4906 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:21:56,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 402 transitions, 5856 flow [2024-06-03 20:21:58,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 402 transitions, 5676 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:58,709 INFO L231 Difference]: Finished difference. Result has 291 places, 385 transitions, 4885 flow [2024-06-03 20:21:58,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=291, PETRI_TRANSITIONS=385} [2024-06-03 20:21:58,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 20:21:58,710 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 385 transitions, 4885 flow [2024-06-03 20:21:58,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:58,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:58,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:21:58,710 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:58,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 999946974, now seen corresponding path program 6 times [2024-06-03 20:21:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:58,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066124133] [2024-06-03 20:21:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066124133] [2024-06-03 20:21:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066124133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:59,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:59,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306983310] [2024-06-03 20:21:59,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:59,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:21:59,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 385 transitions, 4885 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:59,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:59,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:21:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:00,944 INFO L124 PetriNetUnfolderBase]: 3521/5585 cut-off events. [2024-06-03 20:22:00,945 INFO L125 PetriNetUnfolderBase]: For 666320/666323 co-relation queries the response was YES. [2024-06-03 20:22:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47631 conditions, 5585 events. 3521/5585 cut-off events. For 666320/666323 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33607 event pairs, 850 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 47491. Up to 5072 conditions per place. [2024-06-03 20:22:01,015 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 322 selfloop transitions, 85 changer transitions 0/412 dead transitions. [2024-06-03 20:22:01,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 412 transitions, 6161 flow [2024-06-03 20:22:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:22:01,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:22:01,016 INFO L175 Difference]: Start difference. First operand has 291 places, 385 transitions, 4885 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:22:01,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 412 transitions, 6161 flow [2024-06-03 20:22:02,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 412 transitions, 5995 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:02,989 INFO L231 Difference]: Finished difference. Result has 293 places, 391 transitions, 5105 flow [2024-06-03 20:22:02,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5105, PETRI_PLACES=293, PETRI_TRANSITIONS=391} [2024-06-03 20:22:02,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-03 20:22:02,989 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 391 transitions, 5105 flow [2024-06-03 20:22:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:02,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:02,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:22:02,990 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:02,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1406560450, now seen corresponding path program 1 times [2024-06-03 20:22:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713486455] [2024-06-03 20:22:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:03,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713486455] [2024-06-03 20:22:03,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713486455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:03,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:03,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117984292] [2024-06-03 20:22:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:03,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:03,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 391 transitions, 5105 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:03,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:03,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:05,085 INFO L124 PetriNetUnfolderBase]: 3529/5596 cut-off events. [2024-06-03 20:22:05,086 INFO L125 PetriNetUnfolderBase]: For 684429/684429 co-relation queries the response was YES. [2024-06-03 20:22:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48308 conditions, 5596 events. 3529/5596 cut-off events. For 684429/684429 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33677 event pairs, 715 based on Foata normal form. 2/5595 useless extension candidates. Maximal degree in co-relation 48167. Up to 5286 conditions per place. [2024-06-03 20:22:05,149 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 393 selfloop transitions, 21 changer transitions 0/419 dead transitions. [2024-06-03 20:22:05,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 419 transitions, 6077 flow [2024-06-03 20:22:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:22:05,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 20:22:05,150 INFO L175 Difference]: Start difference. First operand has 293 places, 391 transitions, 5105 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:22:05,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 419 transitions, 6077 flow [2024-06-03 20:22:07,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 419 transitions, 5906 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 20:22:07,160 INFO L231 Difference]: Finished difference. Result has 297 places, 393 transitions, 5043 flow [2024-06-03 20:22:07,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5043, PETRI_PLACES=297, PETRI_TRANSITIONS=393} [2024-06-03 20:22:07,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 20:22:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 393 transitions, 5043 flow [2024-06-03 20:22:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:07,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:07,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:22:07,162 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:07,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash 624284448, now seen corresponding path program 2 times [2024-06-03 20:22:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:07,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17917793] [2024-06-03 20:22:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:07,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:08,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:08,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17917793] [2024-06-03 20:22:08,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17917793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:08,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:08,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397540923] [2024-06-03 20:22:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:08,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:08,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:08,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:08,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:08,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 393 transitions, 5043 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:08,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:08,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:08,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:09,406 INFO L124 PetriNetUnfolderBase]: 3524/5589 cut-off events. [2024-06-03 20:22:09,406 INFO L125 PetriNetUnfolderBase]: For 684737/684737 co-relation queries the response was YES. [2024-06-03 20:22:09,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47897 conditions, 5589 events. 3524/5589 cut-off events. For 684737/684737 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33640 event pairs, 848 based on Foata normal form. 2/5588 useless extension candidates. Maximal degree in co-relation 47754. Up to 5309 conditions per place. [2024-06-03 20:22:09,473 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 387 selfloop transitions, 25 changer transitions 0/417 dead transitions. [2024-06-03 20:22:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 417 transitions, 5999 flow [2024-06-03 20:22:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:22:09,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 20:22:09,475 INFO L175 Difference]: Start difference. First operand has 297 places, 393 transitions, 5043 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:22:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 417 transitions, 5999 flow [2024-06-03 20:22:11,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 417 transitions, 5908 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:11,427 INFO L231 Difference]: Finished difference. Result has 299 places, 395 transitions, 5072 flow [2024-06-03 20:22:11,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5072, PETRI_PLACES=299, PETRI_TRANSITIONS=395} [2024-06-03 20:22:11,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-03 20:22:11,428 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 395 transitions, 5072 flow [2024-06-03 20:22:11,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:11,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:11,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:11,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:22:11,429 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:11,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash -170453862, now seen corresponding path program 3 times [2024-06-03 20:22:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470637485] [2024-06-03 20:22:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470637485] [2024-06-03 20:22:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470637485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016102526] [2024-06-03 20:22:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:12,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:12,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 395 transitions, 5072 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:12,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:12,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:12,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:13,557 INFO L124 PetriNetUnfolderBase]: 3519/5582 cut-off events. [2024-06-03 20:22:13,557 INFO L125 PetriNetUnfolderBase]: For 692750/692750 co-relation queries the response was YES. [2024-06-03 20:22:13,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47825 conditions, 5582 events. 3519/5582 cut-off events. For 692750/692750 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33613 event pairs, 844 based on Foata normal form. 2/5581 useless extension candidates. Maximal degree in co-relation 47681. Up to 5322 conditions per place. [2024-06-03 20:22:13,626 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 385 selfloop transitions, 24 changer transitions 0/414 dead transitions. [2024-06-03 20:22:13,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 414 transitions, 6005 flow [2024-06-03 20:22:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:22:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-03 20:22:13,637 INFO L175 Difference]: Start difference. First operand has 299 places, 395 transitions, 5072 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:22:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 414 transitions, 6005 flow [2024-06-03 20:22:15,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 414 transitions, 5903 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:15,868 INFO L231 Difference]: Finished difference. Result has 301 places, 397 transitions, 5089 flow [2024-06-03 20:22:15,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5089, PETRI_PLACES=301, PETRI_TRANSITIONS=397} [2024-06-03 20:22:15,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-03 20:22:15,869 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 397 transitions, 5089 flow [2024-06-03 20:22:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:15,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:22:15,869 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:15,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:15,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1360834938, now seen corresponding path program 1 times [2024-06-03 20:22:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116534259] [2024-06-03 20:22:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116534259] [2024-06-03 20:22:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116534259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:16,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:16,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563438745] [2024-06-03 20:22:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:16,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:16,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:16,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 397 transitions, 5089 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:16,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:16,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:16,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:18,082 INFO L124 PetriNetUnfolderBase]: 3566/5650 cut-off events. [2024-06-03 20:22:18,083 INFO L125 PetriNetUnfolderBase]: For 727652/727655 co-relation queries the response was YES. [2024-06-03 20:22:18,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48981 conditions, 5650 events. 3566/5650 cut-off events. For 727652/727655 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34133 event pairs, 865 based on Foata normal form. 3/5635 useless extension candidates. Maximal degree in co-relation 48836. Up to 4751 conditions per place. [2024-06-03 20:22:18,160 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 272 selfloop transitions, 153 changer transitions 0/430 dead transitions. [2024-06-03 20:22:18,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 430 transitions, 6945 flow [2024-06-03 20:22:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:22:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:22:18,162 INFO L175 Difference]: Start difference. First operand has 301 places, 397 transitions, 5089 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:22:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 430 transitions, 6945 flow [2024-06-03 20:22:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 430 transitions, 6847 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:20,450 INFO L231 Difference]: Finished difference. Result has 304 places, 411 transitions, 5798 flow [2024-06-03 20:22:20,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=304, PETRI_TRANSITIONS=411} [2024-06-03 20:22:20,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-03 20:22:20,453 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 411 transitions, 5798 flow [2024-06-03 20:22:20,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:20,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:20,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:20,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:22:20,453 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:20,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash -887568820, now seen corresponding path program 1 times [2024-06-03 20:22:20,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:20,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238209404] [2024-06-03 20:22:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:21,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238209404] [2024-06-03 20:22:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238209404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:21,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:21,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168348320] [2024-06-03 20:22:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:21,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:21,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 411 transitions, 5798 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:21,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:21,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:21,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:22,795 INFO L124 PetriNetUnfolderBase]: 3576/5682 cut-off events. [2024-06-03 20:22:22,795 INFO L125 PetriNetUnfolderBase]: For 745061/745064 co-relation queries the response was YES. [2024-06-03 20:22:22,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50408 conditions, 5682 events. 3576/5682 cut-off events. For 745061/745064 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34453 event pairs, 778 based on Foata normal form. 2/5680 useless extension candidates. Maximal degree in co-relation 50261. Up to 5272 conditions per place. [2024-06-03 20:22:22,867 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 38 changer transitions 0/440 dead transitions. [2024-06-03 20:22:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 440 transitions, 6813 flow [2024-06-03 20:22:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:22:22,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 20:22:22,868 INFO L175 Difference]: Start difference. First operand has 304 places, 411 transitions, 5798 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:22:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 440 transitions, 6813 flow [2024-06-03 20:22:25,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 440 transitions, 6641 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-03 20:22:25,215 INFO L231 Difference]: Finished difference. Result has 310 places, 414 transitions, 5775 flow [2024-06-03 20:22:25,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5775, PETRI_PLACES=310, PETRI_TRANSITIONS=414} [2024-06-03 20:22:25,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 20:22:25,216 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 414 transitions, 5775 flow [2024-06-03 20:22:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:25,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:25,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:22:25,217 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:25,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1115977056, now seen corresponding path program 2 times [2024-06-03 20:22:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:25,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523176663] [2024-06-03 20:22:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:26,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:26,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523176663] [2024-06-03 20:22:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523176663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:26,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571825888] [2024-06-03 20:22:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:26,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:26,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:26,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:26,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 414 transitions, 5775 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:26,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:26,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:26,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:27,716 INFO L124 PetriNetUnfolderBase]: 3586/5689 cut-off events. [2024-06-03 20:22:27,716 INFO L125 PetriNetUnfolderBase]: For 757357/757360 co-relation queries the response was YES. [2024-06-03 20:22:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50502 conditions, 5689 events. 3586/5689 cut-off events. For 757357/757360 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34429 event pairs, 772 based on Foata normal form. 2/5687 useless extension candidates. Maximal degree in co-relation 50353. Up to 5269 conditions per place. [2024-06-03 20:22:27,788 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 391 selfloop transitions, 46 changer transitions 0/442 dead transitions. [2024-06-03 20:22:27,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 442 transitions, 6792 flow [2024-06-03 20:22:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:22:27,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:22:27,790 INFO L175 Difference]: Start difference. First operand has 310 places, 414 transitions, 5775 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:22:27,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 442 transitions, 6792 flow [2024-06-03 20:22:30,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 442 transitions, 6688 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:30,696 INFO L231 Difference]: Finished difference. Result has 312 places, 417 transitions, 5837 flow [2024-06-03 20:22:30,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5837, PETRI_PLACES=312, PETRI_TRANSITIONS=417} [2024-06-03 20:22:30,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-03 20:22:30,697 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 417 transitions, 5837 flow [2024-06-03 20:22:30,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:30,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:30,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:22:30,697 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:30,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1369407802, now seen corresponding path program 3 times [2024-06-03 20:22:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:30,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434655293] [2024-06-03 20:22:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434655293] [2024-06-03 20:22:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434655293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:31,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008541351] [2024-06-03 20:22:31,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:31,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:31,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:31,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 417 transitions, 5837 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:31,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:31,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:31,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:33,136 INFO L124 PetriNetUnfolderBase]: 3628/5753 cut-off events. [2024-06-03 20:22:33,136 INFO L125 PetriNetUnfolderBase]: For 791610/791613 co-relation queries the response was YES. [2024-06-03 20:22:33,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51558 conditions, 5753 events. 3628/5753 cut-off events. For 791610/791613 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34911 event pairs, 768 based on Foata normal form. 2/5751 useless extension candidates. Maximal degree in co-relation 51408. Up to 5272 conditions per place. [2024-06-03 20:22:33,212 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 381 selfloop transitions, 63 changer transitions 0/449 dead transitions. [2024-06-03 20:22:33,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 449 transitions, 7183 flow [2024-06-03 20:22:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:22:33,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 20:22:33,213 INFO L175 Difference]: Start difference. First operand has 312 places, 417 transitions, 5837 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:22:33,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 449 transitions, 7183 flow [2024-06-03 20:22:35,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 7064 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:35,958 INFO L231 Difference]: Finished difference. Result has 315 places, 426 transitions, 6096 flow [2024-06-03 20:22:35,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6096, PETRI_PLACES=315, PETRI_TRANSITIONS=426} [2024-06-03 20:22:35,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-03 20:22:35,959 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 426 transitions, 6096 flow [2024-06-03 20:22:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:35,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:35,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:35,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:22:35,959 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:35,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2047713182, now seen corresponding path program 7 times [2024-06-03 20:22:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:35,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318627983] [2024-06-03 20:22:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:36,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318627983] [2024-06-03 20:22:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318627983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:36,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796777158] [2024-06-03 20:22:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:36,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:36,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 426 transitions, 6096 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:36,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:36,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:36,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:38,116 INFO L124 PetriNetUnfolderBase]: 3638/5777 cut-off events. [2024-06-03 20:22:38,116 INFO L125 PetriNetUnfolderBase]: For 809538/809538 co-relation queries the response was YES. [2024-06-03 20:22:38,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 5777 events. 3638/5777 cut-off events. For 809538/809538 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35154 event pairs, 885 based on Foata normal form. 2/5760 useless extension candidates. Maximal degree in co-relation 51964. Up to 5342 conditions per place. [2024-06-03 20:22:38,193 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 49 changer transitions 0/453 dead transitions. [2024-06-03 20:22:38,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 453 transitions, 7202 flow [2024-06-03 20:22:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:22:38,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 20:22:38,195 INFO L175 Difference]: Start difference. First operand has 315 places, 426 transitions, 6096 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:22:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 453 transitions, 7202 flow [2024-06-03 20:22:41,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 453 transitions, 7080 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:22:41,774 INFO L231 Difference]: Finished difference. Result has 319 places, 432 transitions, 6222 flow [2024-06-03 20:22:41,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6222, PETRI_PLACES=319, PETRI_TRANSITIONS=432} [2024-06-03 20:22:41,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-03 20:22:41,775 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 432 transitions, 6222 flow [2024-06-03 20:22:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:41,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:41,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:22:41,776 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:41,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1867491042, now seen corresponding path program 8 times [2024-06-03 20:22:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:41,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364595346] [2024-06-03 20:22:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364595346] [2024-06-03 20:22:42,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364595346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:42,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064268033] [2024-06-03 20:22:42,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:42,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:42,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:42,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:42,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 432 transitions, 6222 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:42,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:42,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:42,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:44,114 INFO L124 PetriNetUnfolderBase]: 3640/5778 cut-off events. [2024-06-03 20:22:44,114 INFO L125 PetriNetUnfolderBase]: For 822443/822443 co-relation queries the response was YES. [2024-06-03 20:22:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52417 conditions, 5778 events. 3640/5778 cut-off events. For 822443/822443 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35147 event pairs, 893 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 52263. Up to 5337 conditions per place. [2024-06-03 20:22:44,182 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 51 changer transitions 0/454 dead transitions. [2024-06-03 20:22:44,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 454 transitions, 7307 flow [2024-06-03 20:22:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:22:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 20:22:44,183 INFO L175 Difference]: Start difference. First operand has 319 places, 432 transitions, 6222 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:22:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 454 transitions, 7307 flow [2024-06-03 20:22:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 7163 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:22:47,502 INFO L231 Difference]: Finished difference. Result has 323 places, 435 transitions, 6301 flow [2024-06-03 20:22:47,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6301, PETRI_PLACES=323, PETRI_TRANSITIONS=435} [2024-06-03 20:22:47,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-03 20:22:47,503 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 435 transitions, 6301 flow [2024-06-03 20:22:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:47,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:22:47,503 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:47,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 540764894, now seen corresponding path program 9 times [2024-06-03 20:22:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658963942] [2024-06-03 20:22:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658963942] [2024-06-03 20:22:48,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658963942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:48,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:48,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:48,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694881087] [2024-06-03 20:22:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:48,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:48,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:48,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 435 transitions, 6301 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:48,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:48,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:48,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:49,880 INFO L124 PetriNetUnfolderBase]: 3676/5838 cut-off events. [2024-06-03 20:22:49,881 INFO L125 PetriNetUnfolderBase]: For 859054/859054 co-relation queries the response was YES. [2024-06-03 20:22:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53276 conditions, 5838 events. 3676/5838 cut-off events. For 859054/859054 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35610 event pairs, 873 based on Foata normal form. 4/5823 useless extension candidates. Maximal degree in co-relation 53120. Up to 5258 conditions per place. [2024-06-03 20:22:49,955 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 383 selfloop transitions, 72 changer transitions 0/460 dead transitions. [2024-06-03 20:22:49,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 460 transitions, 7677 flow [2024-06-03 20:22:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:22:49,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 20:22:49,957 INFO L175 Difference]: Start difference. First operand has 323 places, 435 transitions, 6301 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:22:49,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 460 transitions, 7677 flow [2024-06-03 20:22:52,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 460 transitions, 7495 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 20:22:53,001 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 6508 flow [2024-06-03 20:22:53,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6508, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2024-06-03 20:22:53,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-03 20:22:53,002 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 6508 flow [2024-06-03 20:22:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:53,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:22:53,003 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 153971422, now seen corresponding path program 10 times [2024-06-03 20:22:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286260004] [2024-06-03 20:22:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:53,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:53,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286260004] [2024-06-03 20:22:53,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286260004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:53,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:53,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518180218] [2024-06-03 20:22:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:53,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:53,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:53,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:53,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:55,266 INFO L124 PetriNetUnfolderBase]: 3770/5970 cut-off events. [2024-06-03 20:22:55,266 INFO L125 PetriNetUnfolderBase]: For 931206/931209 co-relation queries the response was YES. [2024-06-03 20:22:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55910 conditions, 5970 events. 3770/5970 cut-off events. For 931206/931209 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36497 event pairs, 874 based on Foata normal form. 6/5958 useless extension candidates. Maximal degree in co-relation 55752. Up to 4819 conditions per place. [2024-06-03 20:22:55,346 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 312 selfloop transitions, 164 changer transitions 0/481 dead transitions. [2024-06-03 20:22:55,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 481 transitions, 8758 flow [2024-06-03 20:22:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:22:55,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 20:22:55,347 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 6508 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:22:55,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 481 transitions, 8758 flow [2024-06-03 20:22:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 481 transitions, 8543 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 20:22:58,506 INFO L231 Difference]: Finished difference. Result has 332 places, 463 transitions, 7327 flow [2024-06-03 20:22:58,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7327, PETRI_PLACES=332, PETRI_TRANSITIONS=463} [2024-06-03 20:22:58,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-03 20:22:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 463 transitions, 7327 flow [2024-06-03 20:22:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:58,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:58,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:22:58,507 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:58,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash 149209822, now seen corresponding path program 11 times [2024-06-03 20:22:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:58,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318943079] [2024-06-03 20:22:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318943079] [2024-06-03 20:22:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318943079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:59,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500685791] [2024-06-03 20:22:59,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:59,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:59,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:59,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:22:59,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 463 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:59,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:59,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:22:59,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:00,888 INFO L124 PetriNetUnfolderBase]: 3784/5982 cut-off events. [2024-06-03 20:23:00,888 INFO L125 PetriNetUnfolderBase]: For 945611/945611 co-relation queries the response was YES. [2024-06-03 20:23:00,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56728 conditions, 5982 events. 3784/5982 cut-off events. For 945611/945611 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36422 event pairs, 876 based on Foata normal form. 6/5973 useless extension candidates. Maximal degree in co-relation 56568. Up to 5595 conditions per place. [2024-06-03 20:23:00,971 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 423 selfloop transitions, 56 changer transitions 0/484 dead transitions. [2024-06-03 20:23:00,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 484 transitions, 8726 flow [2024-06-03 20:23:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:23:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:23:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:23:00,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-03 20:23:00,972 INFO L175 Difference]: Start difference. First operand has 332 places, 463 transitions, 7327 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:23:00,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 484 transitions, 8726 flow [2024-06-03 20:23:04,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 484 transitions, 8402 flow, removed 145 selfloop flow, removed 2 redundant places. [2024-06-03 20:23:04,357 INFO L231 Difference]: Finished difference. Result has 340 places, 469 transitions, 7333 flow [2024-06-03 20:23:04,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7333, PETRI_PLACES=340, PETRI_TRANSITIONS=469} [2024-06-03 20:23:04,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-03 20:23:04,358 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 469 transitions, 7333 flow [2024-06-03 20:23:04,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:04,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:04,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:04,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:23:04,359 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:04,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:04,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1200175360, now seen corresponding path program 12 times [2024-06-03 20:23:04,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:04,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374595157] [2024-06-03 20:23:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:05,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374595157] [2024-06-03 20:23:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374595157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:05,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:05,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:05,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806115787] [2024-06-03 20:23:05,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:05,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:05,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:05,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 469 transitions, 7333 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:05,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:05,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:06,571 INFO L124 PetriNetUnfolderBase]: 3806/6022 cut-off events. [2024-06-03 20:23:06,571 INFO L125 PetriNetUnfolderBase]: For 957513/957516 co-relation queries the response was YES. [2024-06-03 20:23:06,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56893 conditions, 6022 events. 3806/6022 cut-off events. For 957513/957516 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36870 event pairs, 882 based on Foata normal form. 6/6010 useless extension candidates. Maximal degree in co-relation 56730. Up to 4860 conditions per place. [2024-06-03 20:23:06,681 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 313 selfloop transitions, 178 changer transitions 0/496 dead transitions. [2024-06-03 20:23:06,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 496 transitions, 9091 flow [2024-06-03 20:23:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:23:06,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 20:23:06,683 INFO L175 Difference]: Start difference. First operand has 340 places, 469 transitions, 7333 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:23:06,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 496 transitions, 9091 flow [2024-06-03 20:23:09,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 496 transitions, 8788 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-03 20:23:09,956 INFO L231 Difference]: Finished difference. Result has 343 places, 479 transitions, 7770 flow [2024-06-03 20:23:09,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7770, PETRI_PLACES=343, PETRI_TRANSITIONS=479} [2024-06-03 20:23:09,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-03 20:23:09,956 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 479 transitions, 7770 flow [2024-06-03 20:23:09,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:09,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:09,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:23:09,957 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:09,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1920521662, now seen corresponding path program 2 times [2024-06-03 20:23:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:09,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620250955] [2024-06-03 20:23:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:09,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:10,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:10,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620250955] [2024-06-03 20:23:10,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620250955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:10,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:10,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:10,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628126543] [2024-06-03 20:23:10,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:10,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:10,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:10,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 479 transitions, 7770 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:10,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:10,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:12,345 INFO L124 PetriNetUnfolderBase]: 3811/6037 cut-off events. [2024-06-03 20:23:12,346 INFO L125 PetriNetUnfolderBase]: For 948940/948940 co-relation queries the response was YES. [2024-06-03 20:23:12,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57467 conditions, 6037 events. 3811/6037 cut-off events. For 948940/948940 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36939 event pairs, 882 based on Foata normal form. 1/6029 useless extension candidates. Maximal degree in co-relation 57303. Up to 5674 conditions per place. [2024-06-03 20:23:12,430 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 50 changer transitions 0/498 dead transitions. [2024-06-03 20:23:12,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 498 transitions, 9148 flow [2024-06-03 20:23:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:23:12,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-03 20:23:12,432 INFO L175 Difference]: Start difference. First operand has 343 places, 479 transitions, 7770 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:23:12,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 498 transitions, 9148 flow [2024-06-03 20:23:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 498 transitions, 8796 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-03 20:23:16,271 INFO L231 Difference]: Finished difference. Result has 349 places, 486 transitions, 7709 flow [2024-06-03 20:23:16,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7709, PETRI_PLACES=349, PETRI_TRANSITIONS=486} [2024-06-03 20:23:16,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-03 20:23:16,271 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 486 transitions, 7709 flow [2024-06-03 20:23:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:16,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:16,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:16,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:23:16,273 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:16,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1435226272, now seen corresponding path program 3 times [2024-06-03 20:23:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626324585] [2024-06-03 20:23:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626324585] [2024-06-03 20:23:17,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626324585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:17,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:17,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:17,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797832253] [2024-06-03 20:23:17,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:17,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:17,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:17,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 486 transitions, 7709 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:17,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:17,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:17,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:18,835 INFO L124 PetriNetUnfolderBase]: 3854/6105 cut-off events. [2024-06-03 20:23:18,835 INFO L125 PetriNetUnfolderBase]: For 990144/990147 co-relation queries the response was YES. [2024-06-03 20:23:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57932 conditions, 6105 events. 3854/6105 cut-off events. For 990144/990147 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37465 event pairs, 889 based on Foata normal form. 3/6090 useless extension candidates. Maximal degree in co-relation 57766. Up to 5122 conditions per place. [2024-06-03 20:23:18,925 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 354 selfloop transitions, 154 changer transitions 0/513 dead transitions. [2024-06-03 20:23:18,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 513 transitions, 9664 flow [2024-06-03 20:23:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:23:18,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 20:23:18,927 INFO L175 Difference]: Start difference. First operand has 349 places, 486 transitions, 7709 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:23:18,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 513 transitions, 9664 flow [2024-06-03 20:23:22,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 513 transitions, 9535 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:22,615 INFO L231 Difference]: Finished difference. Result has 354 places, 495 transitions, 8189 flow [2024-06-03 20:23:22,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8189, PETRI_PLACES=354, PETRI_TRANSITIONS=495} [2024-06-03 20:23:22,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-03 20:23:22,616 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 495 transitions, 8189 flow [2024-06-03 20:23:22,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:22,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:22,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:23:22,617 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:22,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1534968232, now seen corresponding path program 4 times [2024-06-03 20:23:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:22,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069729384] [2024-06-03 20:23:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:23,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:23,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069729384] [2024-06-03 20:23:23,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069729384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:23,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:23,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073427710] [2024-06-03 20:23:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:23,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:23,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:23,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 495 transitions, 8189 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:23,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:23,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:23,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:25,191 INFO L124 PetriNetUnfolderBase]: 3864/6121 cut-off events. [2024-06-03 20:23:25,191 INFO L125 PetriNetUnfolderBase]: For 1007006/1007006 co-relation queries the response was YES. [2024-06-03 20:23:25,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58809 conditions, 6121 events. 3864/6121 cut-off events. For 1007006/1007006 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37578 event pairs, 796 based on Foata normal form. 2/6114 useless extension candidates. Maximal degree in co-relation 58640. Up to 5673 conditions per place. [2024-06-03 20:23:25,275 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 479 selfloop transitions, 38 changer transitions 0/522 dead transitions. [2024-06-03 20:23:25,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 522 transitions, 9374 flow [2024-06-03 20:23:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:23:25,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:23:25,277 INFO L175 Difference]: Start difference. First operand has 354 places, 495 transitions, 8189 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:23:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 522 transitions, 9374 flow [2024-06-03 20:23:28,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 522 transitions, 9005 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:28,441 INFO L231 Difference]: Finished difference. Result has 358 places, 498 transitions, 7981 flow [2024-06-03 20:23:28,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7820, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7981, PETRI_PLACES=358, PETRI_TRANSITIONS=498} [2024-06-03 20:23:28,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-03 20:23:28,442 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 498 transitions, 7981 flow [2024-06-03 20:23:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:28,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:23:28,442 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:28,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -852098520, now seen corresponding path program 5 times [2024-06-03 20:23:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118312752] [2024-06-03 20:23:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118312752] [2024-06-03 20:23:29,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118312752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:29,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:29,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468189907] [2024-06-03 20:23:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:29,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 498 transitions, 7981 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:31,092 INFO L124 PetriNetUnfolderBase]: 3858/6102 cut-off events. [2024-06-03 20:23:31,093 INFO L125 PetriNetUnfolderBase]: For 1011024/1011024 co-relation queries the response was YES. [2024-06-03 20:23:31,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58523 conditions, 6102 events. 3858/6102 cut-off events. For 1011024/1011024 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 37377 event pairs, 791 based on Foata normal form. 2/6095 useless extension candidates. Maximal degree in co-relation 58352. Up to 5637 conditions per place. [2024-06-03 20:23:31,179 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 467 selfloop transitions, 49 changer transitions 0/521 dead transitions. [2024-06-03 20:23:31,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 521 transitions, 9297 flow [2024-06-03 20:23:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:23:31,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:23:31,180 INFO L175 Difference]: Start difference. First operand has 358 places, 498 transitions, 7981 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:23:31,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 521 transitions, 9297 flow [2024-06-03 20:23:35,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 521 transitions, 9187 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:23:35,080 INFO L231 Difference]: Finished difference. Result has 360 places, 498 transitions, 7976 flow [2024-06-03 20:23:35,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7871, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7976, PETRI_PLACES=360, PETRI_TRANSITIONS=498} [2024-06-03 20:23:35,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-03 20:23:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 498 transitions, 7976 flow [2024-06-03 20:23:35,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:35,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:35,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:35,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:23:35,081 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:35,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 255079934, now seen corresponding path program 6 times [2024-06-03 20:23:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794928867] [2024-06-03 20:23:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:35,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794928867] [2024-06-03 20:23:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794928867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:36,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317948112] [2024-06-03 20:23:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:36,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:36,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:36,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 498 transitions, 7976 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:36,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:36,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:37,577 INFO L124 PetriNetUnfolderBase]: 3852/6101 cut-off events. [2024-06-03 20:23:37,577 INFO L125 PetriNetUnfolderBase]: For 1018418/1018418 co-relation queries the response was YES. [2024-06-03 20:23:37,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58407 conditions, 6101 events. 3852/6101 cut-off events. For 1018418/1018418 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37416 event pairs, 793 based on Foata normal form. 2/6094 useless extension candidates. Maximal degree in co-relation 58235. Up to 5657 conditions per place. [2024-06-03 20:23:37,665 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 478 selfloop transitions, 38 changer transitions 0/521 dead transitions. [2024-06-03 20:23:37,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 521 transitions, 9084 flow [2024-06-03 20:23:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:23:37,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 20:23:37,666 INFO L175 Difference]: Start difference. First operand has 360 places, 498 transitions, 7976 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:23:37,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 521 transitions, 9084 flow [2024-06-03 20:23:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 521 transitions, 8894 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:23:41,878 INFO L231 Difference]: Finished difference. Result has 362 places, 498 transitions, 7868 flow [2024-06-03 20:23:41,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7868, PETRI_PLACES=362, PETRI_TRANSITIONS=498} [2024-06-03 20:23:41,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-03 20:23:41,878 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 498 transitions, 7868 flow [2024-06-03 20:23:41,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:41,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:41,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:23:41,879 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:41,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash 268412414, now seen corresponding path program 7 times [2024-06-03 20:23:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:41,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823603558] [2024-06-03 20:23:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:42,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823603558] [2024-06-03 20:23:42,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823603558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:42,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:42,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465378225] [2024-06-03 20:23:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:43,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:43,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 498 transitions, 7868 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:43,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:43,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:43,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:44,475 INFO L124 PetriNetUnfolderBase]: 3836/6072 cut-off events. [2024-06-03 20:23:44,475 INFO L125 PetriNetUnfolderBase]: For 1024469/1024469 co-relation queries the response was YES. [2024-06-03 20:23:44,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57843 conditions, 6072 events. 3836/6072 cut-off events. For 1024469/1024469 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37206 event pairs, 798 based on Foata normal form. 4/6067 useless extension candidates. Maximal degree in co-relation 57670. Up to 5567 conditions per place. [2024-06-03 20:23:44,568 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 50 changer transitions 0/518 dead transitions. [2024-06-03 20:23:44,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 518 transitions, 8958 flow [2024-06-03 20:23:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:23:44,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 20:23:44,570 INFO L175 Difference]: Start difference. First operand has 362 places, 498 transitions, 7868 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:23:44,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 518 transitions, 8958 flow [2024-06-03 20:23:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 518 transitions, 8834 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:49,432 INFO L231 Difference]: Finished difference. Result has 363 places, 498 transitions, 7852 flow [2024-06-03 20:23:49,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=363, PETRI_TRANSITIONS=498} [2024-06-03 20:23:49,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-03 20:23:49,432 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 498 transitions, 7852 flow [2024-06-03 20:23:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:49,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:49,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:23:49,433 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:49,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash 383406914, now seen corresponding path program 8 times [2024-06-03 20:23:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016452051] [2024-06-03 20:23:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:50,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:50,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016452051] [2024-06-03 20:23:50,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016452051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:50,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891388876] [2024-06-03 20:23:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:50,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:50,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:50,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:50,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:50,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 498 transitions, 7852 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:50,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:50,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:50,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:52,389 INFO L124 PetriNetUnfolderBase]: 3856/6108 cut-off events. [2024-06-03 20:23:52,389 INFO L125 PetriNetUnfolderBase]: For 1043274/1043274 co-relation queries the response was YES. [2024-06-03 20:23:52,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58239 conditions, 6108 events. 3856/6108 cut-off events. For 1043274/1043274 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37482 event pairs, 772 based on Foata normal form. 4/6103 useless extension candidates. Maximal degree in co-relation 58065. Up to 5399 conditions per place. [2024-06-03 20:23:52,491 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 89 changer transitions 0/523 dead transitions. [2024-06-03 20:23:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 523 transitions, 9259 flow [2024-06-03 20:23:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:23:52,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 20:23:52,492 INFO L175 Difference]: Start difference. First operand has 363 places, 498 transitions, 7852 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:23:52,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 523 transitions, 9259 flow [2024-06-03 20:23:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 523 transitions, 9129 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:56,754 INFO L231 Difference]: Finished difference. Result has 364 places, 502 transitions, 7991 flow [2024-06-03 20:23:56,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7722, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7991, PETRI_PLACES=364, PETRI_TRANSITIONS=502} [2024-06-03 20:23:56,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-03 20:23:56,755 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 502 transitions, 7991 flow [2024-06-03 20:23:56,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:56,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:56,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:56,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:23:56,756 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:56,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 383703584, now seen corresponding path program 9 times [2024-06-03 20:23:56,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:56,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965791571] [2024-06-03 20:23:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:56,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:57,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:57,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965791571] [2024-06-03 20:23:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965791571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257189637] [2024-06-03 20:23:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:23:57,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 502 transitions, 7991 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:57,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:57,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:23:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:59,537 INFO L124 PetriNetUnfolderBase]: 3840/6089 cut-off events. [2024-06-03 20:23:59,537 INFO L125 PetriNetUnfolderBase]: For 1039546/1039546 co-relation queries the response was YES. [2024-06-03 20:23:59,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57955 conditions, 6089 events. 3840/6089 cut-off events. For 1039546/1039546 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37409 event pairs, 775 based on Foata normal form. 4/6084 useless extension candidates. Maximal degree in co-relation 57780. Up to 5386 conditions per place. [2024-06-03 20:23:59,632 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 87 changer transitions 0/521 dead transitions. [2024-06-03 20:23:59,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 521 transitions, 9087 flow [2024-06-03 20:23:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:23:59,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:23:59,633 INFO L175 Difference]: Start difference. First operand has 364 places, 502 transitions, 7991 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:23:59,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 521 transitions, 9087 flow [2024-06-03 20:24:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 521 transitions, 8749 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:04,523 INFO L231 Difference]: Finished difference. Result has 365 places, 502 transitions, 7836 flow [2024-06-03 20:24:04,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7836, PETRI_PLACES=365, PETRI_TRANSITIONS=502} [2024-06-03 20:24:04,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-03 20:24:04,523 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 502 transitions, 7836 flow [2024-06-03 20:24:04,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:04,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:04,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:24:04,524 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:04,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash 556015902, now seen corresponding path program 1 times [2024-06-03 20:24:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842147604] [2024-06-03 20:24:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:05,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842147604] [2024-06-03 20:24:05,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842147604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:05,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:05,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268547467] [2024-06-03 20:24:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:05,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:05,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:05,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 502 transitions, 7836 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:05,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:05,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:05,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:06,827 INFO L124 PetriNetUnfolderBase]: 3860/6121 cut-off events. [2024-06-03 20:24:06,827 INFO L125 PetriNetUnfolderBase]: For 1056299/1056299 co-relation queries the response was YES. [2024-06-03 20:24:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58102 conditions, 6121 events. 3860/6121 cut-off events. For 1056299/1056299 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37651 event pairs, 868 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 57927. Up to 5664 conditions per place. [2024-06-03 20:24:06,917 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 472 selfloop transitions, 50 changer transitions 0/527 dead transitions. [2024-06-03 20:24:06,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 527 transitions, 9110 flow [2024-06-03 20:24:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:24:06,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 20:24:06,919 INFO L175 Difference]: Start difference. First operand has 365 places, 502 transitions, 7836 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:24:06,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 527 transitions, 9110 flow [2024-06-03 20:24:11,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 527 transitions, 8888 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:24:11,262 INFO L231 Difference]: Finished difference. Result has 366 places, 508 transitions, 7878 flow [2024-06-03 20:24:11,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7878, PETRI_PLACES=366, PETRI_TRANSITIONS=508} [2024-06-03 20:24:11,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-03 20:24:11,265 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 508 transitions, 7878 flow [2024-06-03 20:24:11,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:11,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:11,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:11,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:24:11,266 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:11,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2014945632, now seen corresponding path program 2 times [2024-06-03 20:24:11,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:11,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954538413] [2024-06-03 20:24:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:11,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954538413] [2024-06-03 20:24:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954538413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:12,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:12,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:12,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145551484] [2024-06-03 20:24:12,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:12,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:12,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 508 transitions, 7878 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:13,746 INFO L124 PetriNetUnfolderBase]: 3890/6161 cut-off events. [2024-06-03 20:24:13,746 INFO L125 PetriNetUnfolderBase]: For 1074374/1074377 co-relation queries the response was YES. [2024-06-03 20:24:13,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58594 conditions, 6161 events. 3890/6161 cut-off events. For 1074374/1074377 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37887 event pairs, 848 based on Foata normal form. 4/6154 useless extension candidates. Maximal degree in co-relation 58418. Up to 5457 conditions per place. [2024-06-03 20:24:13,836 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 119 changer transitions 0/540 dead transitions. [2024-06-03 20:24:13,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 540 transitions, 9783 flow [2024-06-03 20:24:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:24:13,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 20:24:13,838 INFO L175 Difference]: Start difference. First operand has 366 places, 508 transitions, 7878 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:24:13,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 540 transitions, 9783 flow [2024-06-03 20:24:19,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 540 transitions, 9631 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:19,232 INFO L231 Difference]: Finished difference. Result has 369 places, 521 transitions, 8300 flow [2024-06-03 20:24:19,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8300, PETRI_PLACES=369, PETRI_TRANSITIONS=521} [2024-06-03 20:24:19,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-03 20:24:19,232 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 521 transitions, 8300 flow [2024-06-03 20:24:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:19,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:19,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:24:19,233 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:19,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2029468946, now seen corresponding path program 10 times [2024-06-03 20:24:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717040075] [2024-06-03 20:24:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:19,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717040075] [2024-06-03 20:24:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717040075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:20,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:20,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:20,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491629424] [2024-06-03 20:24:20,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:20,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:20,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:20,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 521 transitions, 8300 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:20,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:20,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:20,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:21,966 INFO L124 PetriNetUnfolderBase]: 3942/6245 cut-off events. [2024-06-03 20:24:21,966 INFO L125 PetriNetUnfolderBase]: For 1120132/1120135 co-relation queries the response was YES. [2024-06-03 20:24:22,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60021 conditions, 6245 events. 3942/6245 cut-off events. For 1120132/1120135 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38556 event pairs, 807 based on Foata normal form. 4/6238 useless extension candidates. Maximal degree in co-relation 59843. Up to 5292 conditions per place. [2024-06-03 20:24:22,060 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 121 changer transitions 0/551 dead transitions. [2024-06-03 20:24:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 551 transitions, 10067 flow [2024-06-03 20:24:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:24:22,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:24:22,062 INFO L175 Difference]: Start difference. First operand has 369 places, 521 transitions, 8300 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:24:22,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 551 transitions, 10067 flow [2024-06-03 20:24:27,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 551 transitions, 9832 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 20:24:27,357 INFO L231 Difference]: Finished difference. Result has 373 places, 530 transitions, 8512 flow [2024-06-03 20:24:27,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8065, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=373, PETRI_TRANSITIONS=530} [2024-06-03 20:24:27,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-03 20:24:27,357 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 530 transitions, 8512 flow [2024-06-03 20:24:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:27,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:27,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:24:27,358 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2029460576, now seen corresponding path program 11 times [2024-06-03 20:24:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:27,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946668699] [2024-06-03 20:24:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:28,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946668699] [2024-06-03 20:24:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946668699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:28,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804560535] [2024-06-03 20:24:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:28,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 530 transitions, 8512 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:28,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:28,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:28,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:30,188 INFO L124 PetriNetUnfolderBase]: 3956/6270 cut-off events. [2024-06-03 20:24:30,189 INFO L125 PetriNetUnfolderBase]: For 1143792/1143795 co-relation queries the response was YES. [2024-06-03 20:24:30,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 6270 events. 3956/6270 cut-off events. For 1143792/1143795 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38744 event pairs, 802 based on Foata normal form. 6/6265 useless extension candidates. Maximal degree in co-relation 60167. Up to 5004 conditions per place. [2024-06-03 20:24:30,284 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 385 selfloop transitions, 165 changer transitions 0/555 dead transitions. [2024-06-03 20:24:30,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 555 transitions, 10238 flow [2024-06-03 20:24:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:24:30,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 20:24:30,285 INFO L175 Difference]: Start difference. First operand has 373 places, 530 transitions, 8512 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:24:30,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 555 transitions, 10238 flow [2024-06-03 20:24:36,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 555 transitions, 10030 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:24:36,383 INFO L231 Difference]: Finished difference. Result has 378 places, 536 transitions, 8764 flow [2024-06-03 20:24:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8764, PETRI_PLACES=378, PETRI_TRANSITIONS=536} [2024-06-03 20:24:36,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-03 20:24:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 536 transitions, 8764 flow [2024-06-03 20:24:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:24:36,384 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1434934562, now seen corresponding path program 3 times [2024-06-03 20:24:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529489224] [2024-06-03 20:24:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:37,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529489224] [2024-06-03 20:24:37,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529489224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:37,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:37,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:37,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510480745] [2024-06-03 20:24:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:37,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:37,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:37,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:37,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 536 transitions, 8764 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:37,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:37,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:39,039 INFO L124 PetriNetUnfolderBase]: 3948/6257 cut-off events. [2024-06-03 20:24:39,039 INFO L125 PetriNetUnfolderBase]: For 1122936/1122939 co-relation queries the response was YES. [2024-06-03 20:24:39,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60247 conditions, 6257 events. 3948/6257 cut-off events. For 1122936/1122939 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38658 event pairs, 860 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 60066. Up to 5679 conditions per place. [2024-06-03 20:24:39,123 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 466 selfloop transitions, 80 changer transitions 0/551 dead transitions. [2024-06-03 20:24:39,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 551 transitions, 9930 flow [2024-06-03 20:24:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:24:39,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 20:24:39,125 INFO L175 Difference]: Start difference. First operand has 378 places, 536 transitions, 8764 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:24:39,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 551 transitions, 9930 flow [2024-06-03 20:24:44,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 551 transitions, 9659 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 20:24:44,247 INFO L231 Difference]: Finished difference. Result has 382 places, 536 transitions, 8659 flow [2024-06-03 20:24:44,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8493, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8659, PETRI_PLACES=382, PETRI_TRANSITIONS=536} [2024-06-03 20:24:44,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-03 20:24:44,248 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 536 transitions, 8659 flow [2024-06-03 20:24:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:44,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:44,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:44,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:24:44,248 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:44,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash 153978366, now seen corresponding path program 12 times [2024-06-03 20:24:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018701010] [2024-06-03 20:24:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:45,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:45,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018701010] [2024-06-03 20:24:45,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018701010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:45,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484843673] [2024-06-03 20:24:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:45,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:45,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:45,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 536 transitions, 8659 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:45,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:45,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:45,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:46,939 INFO L124 PetriNetUnfolderBase]: 3942/6245 cut-off events. [2024-06-03 20:24:46,939 INFO L125 PetriNetUnfolderBase]: For 1142451/1142454 co-relation queries the response was YES. [2024-06-03 20:24:47,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59453 conditions, 6245 events. 3942/6245 cut-off events. For 1142451/1142454 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38475 event pairs, 786 based on Foata normal form. 6/6240 useless extension candidates. Maximal degree in co-relation 59271. Up to 4998 conditions per place. [2024-06-03 20:24:47,033 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 375 selfloop transitions, 179 changer transitions 0/559 dead transitions. [2024-06-03 20:24:47,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 559 transitions, 10344 flow [2024-06-03 20:24:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:24:47,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 20:24:47,034 INFO L175 Difference]: Start difference. First operand has 382 places, 536 transitions, 8659 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:24:47,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 559 transitions, 10344 flow [2024-06-03 20:24:53,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 559 transitions, 10126 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:24:53,220 INFO L231 Difference]: Finished difference. Result has 385 places, 539 transitions, 8859 flow [2024-06-03 20:24:53,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8859, PETRI_PLACES=385, PETRI_TRANSITIONS=539} [2024-06-03 20:24:53,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-03 20:24:53,221 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 539 transitions, 8859 flow [2024-06-03 20:24:53,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:53,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:53,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:53,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:24:53,221 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:53,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1894012990, now seen corresponding path program 1 times [2024-06-03 20:24:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100642629] [2024-06-03 20:24:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100642629] [2024-06-03 20:24:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100642629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:54,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384806356] [2024-06-03 20:24:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:54,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:54,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:24:54,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 539 transitions, 8859 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:24:54,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:54,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:24:54,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:56,163 INFO L124 PetriNetUnfolderBase]: 3950/6260 cut-off events. [2024-06-03 20:24:56,163 INFO L125 PetriNetUnfolderBase]: For 1136452/1136452 co-relation queries the response was YES. [2024-06-03 20:24:56,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60187 conditions, 6260 events. 3950/6260 cut-off events. For 1136452/1136452 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38616 event pairs, 816 based on Foata normal form. 2/6259 useless extension candidates. Maximal degree in co-relation 60004. Up to 5903 conditions per place. [2024-06-03 20:24:56,259 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 542 selfloop transitions, 17 changer transitions 0/564 dead transitions. [2024-06-03 20:24:56,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 564 transitions, 10137 flow [2024-06-03 20:24:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:24:56,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-03 20:24:56,260 INFO L175 Difference]: Start difference. First operand has 385 places, 539 transitions, 8859 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:24:56,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 564 transitions, 10137 flow [2024-06-03 20:25:00,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 564 transitions, 9694 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:00,893 INFO L231 Difference]: Finished difference. Result has 387 places, 541 transitions, 8543 flow [2024-06-03 20:25:00,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8416, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8543, PETRI_PLACES=387, PETRI_TRANSITIONS=541} [2024-06-03 20:25:00,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-03 20:25:00,893 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 541 transitions, 8543 flow [2024-06-03 20:25:00,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:25:00,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:00,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:00,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:25:00,894 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:00,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 268308006, now seen corresponding path program 2 times [2024-06-03 20:25:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:00,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000127814] [2024-06-03 20:25:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:02,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:02,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000127814] [2024-06-03 20:25:02,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000127814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:02,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:02,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:02,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941521460] [2024-06-03 20:25:02,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:02,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:02,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:02,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:02,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 541 transitions, 8543 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:25:02,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:02,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:02,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:04,070 INFO L124 PetriNetUnfolderBase]: 3958/6278 cut-off events. [2024-06-03 20:25:04,070 INFO L125 PetriNetUnfolderBase]: For 1152061/1152061 co-relation queries the response was YES. [2024-06-03 20:25:04,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59932 conditions, 6278 events. 3958/6278 cut-off events. For 1152061/1152061 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38791 event pairs, 850 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 59748. Up to 5927 conditions per place. [2024-06-03 20:25:04,169 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 540 selfloop transitions, 18 changer transitions 0/563 dead transitions. [2024-06-03 20:25:04,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 563 transitions, 9811 flow [2024-06-03 20:25:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:25:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:25:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:25:04,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 20:25:04,170 INFO L175 Difference]: Start difference. First operand has 387 places, 541 transitions, 8543 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:25:04,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 563 transitions, 9811 flow [2024-06-03 20:25:10,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 563 transitions, 9700 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:10,390 INFO L231 Difference]: Finished difference. Result has 389 places, 543 transitions, 8565 flow [2024-06-03 20:25:10,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8432, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8565, PETRI_PLACES=389, PETRI_TRANSITIONS=543} [2024-06-03 20:25:10,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-03 20:25:10,390 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 543 transitions, 8565 flow [2024-06-03 20:25:10,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:25:10,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:10,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:10,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:25:10,398 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:10,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1196657700, now seen corresponding path program 1 times [2024-06-03 20:25:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:10,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979254422] [2024-06-03 20:25:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:10,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:11,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:11,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979254422] [2024-06-03 20:25:11,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979254422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:11,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:11,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029440521] [2024-06-03 20:25:11,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:11,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:11,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:11,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:11,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:11,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:11,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 543 transitions, 8565 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:25:11,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:11,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:11,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:13,506 INFO L124 PetriNetUnfolderBase]: 3978/6303 cut-off events. [2024-06-03 20:25:13,506 INFO L125 PetriNetUnfolderBase]: For 1187162/1187162 co-relation queries the response was YES. [2024-06-03 20:25:13,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60305 conditions, 6303 events. 3978/6303 cut-off events. For 1187162/1187162 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38922 event pairs, 811 based on Foata normal form. 4/6298 useless extension candidates. Maximal degree in co-relation 60120. Up to 5752 conditions per place. [2024-06-03 20:25:13,596 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 57 changer transitions 0/569 dead transitions. [2024-06-03 20:25:13,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 569 transitions, 9864 flow [2024-06-03 20:25:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:25:13,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 20:25:13,598 INFO L175 Difference]: Start difference. First operand has 389 places, 543 transitions, 8565 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:25:13,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 569 transitions, 9864 flow [2024-06-03 20:25:20,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 569 transitions, 9747 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:20,243 INFO L231 Difference]: Finished difference. Result has 392 places, 547 transitions, 8680 flow [2024-06-03 20:25:20,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8448, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8680, PETRI_PLACES=392, PETRI_TRANSITIONS=547} [2024-06-03 20:25:20,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-03 20:25:20,244 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 547 transitions, 8680 flow [2024-06-03 20:25:20,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:25:20,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:20,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:20,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:25:20,244 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:20,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash 383714496, now seen corresponding path program 3 times [2024-06-03 20:25:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:20,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139704890] [2024-06-03 20:25:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:20,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139704890] [2024-06-03 20:25:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139704890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:21,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:21,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666577883] [2024-06-03 20:25:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:21,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:21,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:21,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 547 transitions, 8680 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:21,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:21,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:21,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:23,373 INFO L124 PetriNetUnfolderBase]: 3986/6311 cut-off events. [2024-06-03 20:25:23,374 INFO L125 PetriNetUnfolderBase]: For 1193060/1193060 co-relation queries the response was YES. [2024-06-03 20:25:23,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60724 conditions, 6311 events. 3986/6311 cut-off events. For 1193060/1193060 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38878 event pairs, 823 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 60538. Up to 5950 conditions per place. [2024-06-03 20:25:23,470 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 537 selfloop transitions, 26 changer transitions 0/568 dead transitions. [2024-06-03 20:25:23,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 568 transitions, 9962 flow [2024-06-03 20:25:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:25:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:25:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:25:23,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 20:25:23,471 INFO L175 Difference]: Start difference. First operand has 392 places, 547 transitions, 8680 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:25:23,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 568 transitions, 9962 flow [2024-06-03 20:25:29,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 568 transitions, 9769 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:29,021 INFO L231 Difference]: Finished difference. Result has 393 places, 549 transitions, 8640 flow [2024-06-03 20:25:29,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8640, PETRI_PLACES=393, PETRI_TRANSITIONS=549} [2024-06-03 20:25:29,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-03 20:25:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 549 transitions, 8640 flow [2024-06-03 20:25:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:29,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:29,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:25:29,022 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:29,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash 383719456, now seen corresponding path program 2 times [2024-06-03 20:25:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970187367] [2024-06-03 20:25:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970187367] [2024-06-03 20:25:30,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970187367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:30,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:30,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237607522] [2024-06-03 20:25:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:30,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:30,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 549 transitions, 8640 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:30,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:32,002 INFO L124 PetriNetUnfolderBase]: 4006/6336 cut-off events. [2024-06-03 20:25:32,002 INFO L125 PetriNetUnfolderBase]: For 1231199/1231199 co-relation queries the response was YES. [2024-06-03 20:25:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60949 conditions, 6336 events. 4006/6336 cut-off events. For 1231199/1231199 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39037 event pairs, 781 based on Foata normal form. 4/6331 useless extension candidates. Maximal degree in co-relation 60762. Up to 5605 conditions per place. [2024-06-03 20:25:32,097 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 93 changer transitions 0/574 dead transitions. [2024-06-03 20:25:32,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 574 transitions, 9957 flow [2024-06-03 20:25:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:25:32,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 20:25:32,099 INFO L175 Difference]: Start difference. First operand has 393 places, 549 transitions, 8640 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:25:32,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 574 transitions, 9957 flow [2024-06-03 20:25:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 574 transitions, 9820 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:39,676 INFO L231 Difference]: Finished difference. Result has 396 places, 553 transitions, 8815 flow [2024-06-03 20:25:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8815, PETRI_PLACES=396, PETRI_TRANSITIONS=553} [2024-06-03 20:25:39,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-03 20:25:39,677 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 553 transitions, 8815 flow [2024-06-03 20:25:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:39,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:39,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:25:39,677 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:39,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 383898946, now seen corresponding path program 3 times [2024-06-03 20:25:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:39,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334077575] [2024-06-03 20:25:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334077575] [2024-06-03 20:25:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334077575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:40,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:40,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669916199] [2024-06-03 20:25:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:40,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:40,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:40,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 553 transitions, 8815 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:40,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:40,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:42,610 INFO L124 PetriNetUnfolderBase]: 4058/6413 cut-off events. [2024-06-03 20:25:42,610 INFO L125 PetriNetUnfolderBase]: For 1282392/1282392 co-relation queries the response was YES. [2024-06-03 20:25:42,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62517 conditions, 6413 events. 4058/6413 cut-off events. For 1282392/1282392 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39555 event pairs, 777 based on Foata normal form. 4/6408 useless extension candidates. Maximal degree in co-relation 62329. Up to 5601 conditions per place. [2024-06-03 20:25:42,709 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 460 selfloop transitions, 120 changer transitions 0/585 dead transitions. [2024-06-03 20:25:42,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 585 transitions, 10541 flow [2024-06-03 20:25:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:25:42,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 20:25:42,710 INFO L175 Difference]: Start difference. First operand has 396 places, 553 transitions, 8815 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:25:42,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 585 transitions, 10541 flow [2024-06-03 20:25:49,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 10268 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:49,430 INFO L231 Difference]: Finished difference. Result has 398 places, 561 transitions, 9036 flow [2024-06-03 20:25:49,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8542, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9036, PETRI_PLACES=398, PETRI_TRANSITIONS=561} [2024-06-03 20:25:49,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-03 20:25:49,430 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 561 transitions, 9036 flow [2024-06-03 20:25:49,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:49,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:49,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:25:49,431 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:49,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1603236454, now seen corresponding path program 4 times [2024-06-03 20:25:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:49,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185991181] [2024-06-03 20:25:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:50,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185991181] [2024-06-03 20:25:50,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185991181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:50,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:50,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:50,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723299671] [2024-06-03 20:25:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:50,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:50,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:25:50,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 561 transitions, 9036 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:50,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:50,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:25:50,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:52,688 INFO L124 PetriNetUnfolderBase]: 4046/6389 cut-off events. [2024-06-03 20:25:52,688 INFO L125 PetriNetUnfolderBase]: For 1272760/1272760 co-relation queries the response was YES. [2024-06-03 20:25:52,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62021 conditions, 6389 events. 4046/6389 cut-off events. For 1272760/1272760 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39334 event pairs, 775 based on Foata normal form. 4/6384 useless extension candidates. Maximal degree in co-relation 61832. Up to 5661 conditions per place. [2024-06-03 20:25:52,783 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 102 changer transitions 0/583 dead transitions. [2024-06-03 20:25:52,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 583 transitions, 10270 flow [2024-06-03 20:25:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:25:52,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 20:25:52,784 INFO L175 Difference]: Start difference. First operand has 398 places, 561 transitions, 9036 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:25:52,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 583 transitions, 10270 flow [2024-06-03 20:25:59,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 583 transitions, 9941 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:59,626 INFO L231 Difference]: Finished difference. Result has 401 places, 561 transitions, 8918 flow [2024-06-03 20:25:59,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8707, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8918, PETRI_PLACES=401, PETRI_TRANSITIONS=561} [2024-06-03 20:25:59,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-03 20:25:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 561 transitions, 8918 flow [2024-06-03 20:25:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:59,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:25:59,627 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:59,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2020933344, now seen corresponding path program 5 times [2024-06-03 20:25:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391432402] [2024-06-03 20:25:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391432402] [2024-06-03 20:26:00,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391432402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:00,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:00,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:26:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594848638] [2024-06-03 20:26:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:00,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:26:00,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:26:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:26:00,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:00,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 561 transitions, 8918 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-03 20:26:00,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:00,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:02,540 INFO L124 PetriNetUnfolderBase]: 4066/6420 cut-off events. [2024-06-03 20:26:02,540 INFO L125 PetriNetUnfolderBase]: For 1291334/1291337 co-relation queries the response was YES. [2024-06-03 20:26:02,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62386 conditions, 6420 events. 4066/6420 cut-off events. For 1291334/1291337 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 39553 event pairs, 788 based on Foata normal form. 4/6413 useless extension candidates. Maximal degree in co-relation 62196. Up to 5308 conditions per place. [2024-06-03 20:26:02,640 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 389 selfloop transitions, 191 changer transitions 0/585 dead transitions. [2024-06-03 20:26:02,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 585 transitions, 10523 flow [2024-06-03 20:26:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:26:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:26:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:26:02,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:26:02,642 INFO L175 Difference]: Start difference. First operand has 401 places, 561 transitions, 8918 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:26:02,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 585 transitions, 10523 flow [2024-06-03 20:26:10,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 585 transitions, 10298 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:10,879 INFO L231 Difference]: Finished difference. Result has 402 places, 565 transitions, 9216 flow [2024-06-03 20:26:10,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9216, PETRI_PLACES=402, PETRI_TRANSITIONS=565} [2024-06-03 20:26:10,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-03 20:26:10,880 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 565 transitions, 9216 flow [2024-06-03 20:26:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2024-06-03 20:26:10,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:10,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:10,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:26:10,881 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2020939854, now seen corresponding path program 6 times [2024-06-03 20:26:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197197545] [2024-06-03 20:26:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197197545] [2024-06-03 20:26:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197197545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:12,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:12,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:12,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633676573] [2024-06-03 20:26:12,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:12,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:12,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:12,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:12,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 565 transitions, 9216 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:12,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:12,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:12,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:13,893 INFO L124 PetriNetUnfolderBase]: 4086/6453 cut-off events. [2024-06-03 20:26:13,894 INFO L125 PetriNetUnfolderBase]: For 1315656/1315659 co-relation queries the response was YES. [2024-06-03 20:26:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63286 conditions, 6453 events. 4086/6453 cut-off events. For 1315656/1315659 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39856 event pairs, 802 based on Foata normal form. 4/6446 useless extension candidates. Maximal degree in co-relation 63095. Up to 5498 conditions per place. [2024-06-03 20:26:13,995 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 458 selfloop transitions, 127 changer transitions 0/590 dead transitions. [2024-06-03 20:26:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 590 transitions, 10599 flow [2024-06-03 20:26:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:26:13,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 20:26:13,997 INFO L175 Difference]: Start difference. First operand has 402 places, 565 transitions, 9216 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:26:13,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 590 transitions, 10599 flow [2024-06-03 20:26:21,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 590 transitions, 10196 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-03 20:26:21,325 INFO L231 Difference]: Finished difference. Result has 405 places, 569 transitions, 9217 flow [2024-06-03 20:26:21,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8833, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9217, PETRI_PLACES=405, PETRI_TRANSITIONS=569} [2024-06-03 20:26:21,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-03 20:26:21,326 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 569 transitions, 9217 flow [2024-06-03 20:26:21,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:21,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:21,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:21,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:26:21,327 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:21,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1641864770, now seen corresponding path program 7 times [2024-06-03 20:26:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834164372] [2024-06-03 20:26:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:22,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834164372] [2024-06-03 20:26:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834164372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:22,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:22,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338430610] [2024-06-03 20:26:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:22,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:22,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:22,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:22,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 569 transitions, 9217 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:26:22,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:22,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:22,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:24,491 INFO L124 PetriNetUnfolderBase]: 4106/6477 cut-off events. [2024-06-03 20:26:24,491 INFO L125 PetriNetUnfolderBase]: For 1315682/1315685 co-relation queries the response was YES. [2024-06-03 20:26:24,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63161 conditions, 6477 events. 4106/6477 cut-off events. For 1315682/1315685 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40001 event pairs, 791 based on Foata normal form. 4/6470 useless extension candidates. Maximal degree in co-relation 62971. Up to 5526 conditions per place. [2024-06-03 20:26:24,590 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 435 selfloop transitions, 153 changer transitions 0/593 dead transitions. [2024-06-03 20:26:24,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 593 transitions, 10592 flow [2024-06-03 20:26:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:26:24,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 20:26:24,592 INFO L175 Difference]: Start difference. First operand has 405 places, 569 transitions, 9217 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:26:24,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 593 transitions, 10592 flow [2024-06-03 20:26:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 593 transitions, 10247 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:31,037 INFO L231 Difference]: Finished difference. Result has 407 places, 573 transitions, 9316 flow [2024-06-03 20:26:31,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9316, PETRI_PLACES=407, PETRI_TRANSITIONS=573} [2024-06-03 20:26:31,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-03 20:26:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 573 transitions, 9316 flow [2024-06-03 20:26:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:26:31,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:31,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:31,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:26:31,039 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:31,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2021117794, now seen corresponding path program 4 times [2024-06-03 20:26:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795808357] [2024-06-03 20:26:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795808357] [2024-06-03 20:26:32,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795808357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:32,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:32,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510573074] [2024-06-03 20:26:32,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:32,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:32,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:32,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:32,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:32,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:32,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 573 transitions, 9316 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:32,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:32,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:32,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:34,078 INFO L124 PetriNetUnfolderBase]: 4101/6467 cut-off events. [2024-06-03 20:26:34,078 INFO L125 PetriNetUnfolderBase]: For 1304079/1304082 co-relation queries the response was YES. [2024-06-03 20:26:34,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62900 conditions, 6467 events. 4101/6467 cut-off events. For 1304079/1304082 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39878 event pairs, 831 based on Foata normal form. 2/6465 useless extension candidates. Maximal degree in co-relation 62709. Up to 6096 conditions per place. [2024-06-03 20:26:34,177 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 555 selfloop transitions, 32 changer transitions 0/592 dead transitions. [2024-06-03 20:26:34,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 592 transitions, 10648 flow [2024-06-03 20:26:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:26:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:26:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:26:34,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 20:26:34,178 INFO L175 Difference]: Start difference. First operand has 407 places, 573 transitions, 9316 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:26:34,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 592 transitions, 10648 flow [2024-06-03 20:26:39,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 592 transitions, 10247 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:39,142 INFO L231 Difference]: Finished difference. Result has 410 places, 575 transitions, 9084 flow [2024-06-03 20:26:39,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8915, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9084, PETRI_PLACES=410, PETRI_TRANSITIONS=575} [2024-06-03 20:26:39,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-03 20:26:39,143 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 575 transitions, 9084 flow [2024-06-03 20:26:39,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:39,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:39,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:26:39,144 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:39,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1467502600, now seen corresponding path program 8 times [2024-06-03 20:26:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:39,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522041921] [2024-06-03 20:26:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:39,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:40,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:40,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522041921] [2024-06-03 20:26:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522041921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:40,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:40,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:40,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058348628] [2024-06-03 20:26:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:40,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:40,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 575 transitions, 9084 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:26:40,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:40,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:40,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:42,393 INFO L124 PetriNetUnfolderBase]: 4089/6455 cut-off events. [2024-06-03 20:26:42,393 INFO L125 PetriNetUnfolderBase]: For 1304554/1304557 co-relation queries the response was YES. [2024-06-03 20:26:42,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61739 conditions, 6455 events. 4089/6455 cut-off events. For 1304554/1304557 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39837 event pairs, 801 based on Foata normal form. 4/6448 useless extension candidates. Maximal degree in co-relation 61547. Up to 5503 conditions per place. [2024-06-03 20:26:42,479 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 126 changer transitions 0/594 dead transitions. [2024-06-03 20:26:42,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 594 transitions, 10328 flow [2024-06-03 20:26:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:26:42,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 20:26:42,481 INFO L175 Difference]: Start difference. First operand has 410 places, 575 transitions, 9084 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:26:42,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 594 transitions, 10328 flow [2024-06-03 20:26:49,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 594 transitions, 10117 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-03 20:26:49,715 INFO L231 Difference]: Finished difference. Result has 413 places, 575 transitions, 9132 flow [2024-06-03 20:26:49,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8873, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9132, PETRI_PLACES=413, PETRI_TRANSITIONS=575} [2024-06-03 20:26:49,715 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-03 20:26:49,715 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 575 transitions, 9132 flow [2024-06-03 20:26:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:26:49,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:49,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:49,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:26:49,716 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:49,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash 443752877, now seen corresponding path program 1 times [2024-06-03 20:26:49,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:49,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535465917] [2024-06-03 20:26:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:49,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:50,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:50,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535465917] [2024-06-03 20:26:50,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535465917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:50,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:50,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:50,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578737591] [2024-06-03 20:26:50,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:50,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:50,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:50,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:50,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 575 transitions, 9132 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:50,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:50,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:50,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:52,441 INFO L124 PetriNetUnfolderBase]: 4086/6448 cut-off events. [2024-06-03 20:26:52,442 INFO L125 PetriNetUnfolderBase]: For 1290869/1290869 co-relation queries the response was YES. [2024-06-03 20:26:52,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61879 conditions, 6448 events. 4086/6448 cut-off events. For 1290869/1290869 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39697 event pairs, 896 based on Foata normal form. 1/6446 useless extension candidates. Maximal degree in co-relation 61686. Up to 6080 conditions per place. [2024-06-03 20:26:52,538 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 28 changer transitions 0/600 dead transitions. [2024-06-03 20:26:52,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 600 transitions, 10414 flow [2024-06-03 20:26:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:26:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:26:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:26:52,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 20:26:52,540 INFO L175 Difference]: Start difference. First operand has 413 places, 575 transitions, 9132 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:26:52,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 600 transitions, 10414 flow [2024-06-03 20:26:57,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 600 transitions, 10022 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-03 20:26:57,594 INFO L231 Difference]: Finished difference. Result has 413 places, 575 transitions, 8806 flow [2024-06-03 20:26:57,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8740, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8806, PETRI_PLACES=413, PETRI_TRANSITIONS=575} [2024-06-03 20:26:57,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-03 20:26:57,594 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 575 transitions, 8806 flow [2024-06-03 20:26:57,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:57,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:57,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:26:57,595 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:57,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash -229581460, now seen corresponding path program 1 times [2024-06-03 20:26:57,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:57,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063202398] [2024-06-03 20:26:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:57,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063202398] [2024-06-03 20:26:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063202398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:58,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:58,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:26:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158893044] [2024-06-03 20:26:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:26:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:26:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:26:58,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:26:58,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 575 transitions, 8806 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:58,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:58,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:26:58,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:00,002 INFO L124 PetriNetUnfolderBase]: 4096/6457 cut-off events. [2024-06-03 20:27:00,002 INFO L125 PetriNetUnfolderBase]: For 1316951/1316951 co-relation queries the response was YES. [2024-06-03 20:27:00,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61511 conditions, 6457 events. 4096/6457 cut-off events. For 1316951/1316951 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39707 event pairs, 879 based on Foata normal form. 2/6444 useless extension candidates. Maximal degree in co-relation 61317. Up to 5967 conditions per place. [2024-06-03 20:27:00,101 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 534 selfloop transitions, 58 changer transitions 0/597 dead transitions. [2024-06-03 20:27:00,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 597 transitions, 10149 flow [2024-06-03 20:27:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:27:00,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:27:00,103 INFO L175 Difference]: Start difference. First operand has 413 places, 575 transitions, 8806 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:27:00,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 597 transitions, 10149 flow [2024-06-03 20:27:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 597 transitions, 10081 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:27:08,124 INFO L231 Difference]: Finished difference. Result has 414 places, 578 transitions, 8955 flow [2024-06-03 20:27:08,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8738, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8955, PETRI_PLACES=414, PETRI_TRANSITIONS=578} [2024-06-03 20:27:08,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-03 20:27:08,125 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 578 transitions, 8955 flow [2024-06-03 20:27:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:08,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:08,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:08,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:27:08,125 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:08,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1506064016, now seen corresponding path program 2 times [2024-06-03 20:27:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:08,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546666070] [2024-06-03 20:27:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:08,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546666070] [2024-06-03 20:27:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546666070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:27:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448156919] [2024-06-03 20:27:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:08,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:27:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:27:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:27:08,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:27:08,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 578 transitions, 8955 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:08,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:08,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:27:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:10,588 INFO L124 PetriNetUnfolderBase]: 4162/6565 cut-off events. [2024-06-03 20:27:10,588 INFO L125 PetriNetUnfolderBase]: For 1395301/1395301 co-relation queries the response was YES. [2024-06-03 20:27:10,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63704 conditions, 6565 events. 4162/6565 cut-off events. For 1395301/1395301 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40533 event pairs, 839 based on Foata normal form. 2/6552 useless extension candidates. Maximal degree in co-relation 63509. Up to 5701 conditions per place. [2024-06-03 20:27:10,687 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 446 selfloop transitions, 161 changer transitions 0/612 dead transitions. [2024-06-03 20:27:10,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 612 transitions, 11167 flow [2024-06-03 20:27:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:27:10,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:27:10,688 INFO L175 Difference]: Start difference. First operand has 414 places, 578 transitions, 8955 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:27:10,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 612 transitions, 11167 flow [2024-06-03 20:27:18,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 612 transitions, 11036 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:27:18,465 INFO L231 Difference]: Finished difference. Result has 419 places, 592 transitions, 9727 flow [2024-06-03 20:27:18,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8824, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9727, PETRI_PLACES=419, PETRI_TRANSITIONS=592} [2024-06-03 20:27:18,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-03 20:27:18,466 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 592 transitions, 9727 flow [2024-06-03 20:27:18,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:18,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:18,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:18,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:27:18,466 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:18,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1449953786, now seen corresponding path program 3 times [2024-06-03 20:27:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:18,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894611706] [2024-06-03 20:27:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:18,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:19,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:19,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894611706] [2024-06-03 20:27:19,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894611706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:19,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:19,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:27:19,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312347964] [2024-06-03 20:27:19,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:27:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:27:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:27:19,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:27:19,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 592 transitions, 9727 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:19,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:19,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:27:19,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:20,933 INFO L124 PetriNetUnfolderBase]: 4150/6527 cut-off events. [2024-06-03 20:27:20,933 INFO L125 PetriNetUnfolderBase]: For 1402782/1402782 co-relation queries the response was YES. [2024-06-03 20:27:21,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64012 conditions, 6527 events. 4150/6527 cut-off events. For 1402782/1402782 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 40150 event pairs, 836 based on Foata normal form. 4/6516 useless extension candidates. Maximal degree in co-relation 63814. Up to 5693 conditions per place. [2024-06-03 20:27:21,038 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 175 changer transitions 0/612 dead transitions. [2024-06-03 20:27:21,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 612 transitions, 11552 flow [2024-06-03 20:27:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:27:21,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 20:27:21,040 INFO L175 Difference]: Start difference. First operand has 419 places, 592 transitions, 9727 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:27:21,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 612 transitions, 11552 flow [2024-06-03 20:27:28,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 612 transitions, 11370 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-03 20:27:28,959 INFO L231 Difference]: Finished difference. Result has 423 places, 592 transitions, 9919 flow [2024-06-03 20:27:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9919, PETRI_PLACES=423, PETRI_TRANSITIONS=592} [2024-06-03 20:27:28,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-03 20:27:28,959 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 592 transitions, 9919 flow [2024-06-03 20:27:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:27:28,960 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:28,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash -285019145, now seen corresponding path program 2 times [2024-06-03 20:27:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140338820] [2024-06-03 20:27:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:28,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:29,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140338820] [2024-06-03 20:27:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140338820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:29,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:29,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534108073] [2024-06-03 20:27:29,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:29,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:29,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:30,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:27:30,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 592 transitions, 9919 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:30,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:30,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:27:30,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:31,718 INFO L124 PetriNetUnfolderBase]: 4155/6555 cut-off events. [2024-06-03 20:27:31,718 INFO L125 PetriNetUnfolderBase]: For 1378142/1378145 co-relation queries the response was YES. [2024-06-03 20:27:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64599 conditions, 6555 events. 4155/6555 cut-off events. For 1378142/1378145 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40487 event pairs, 911 based on Foata normal form. 1/6552 useless extension candidates. Maximal degree in co-relation 64400. Up to 6066 conditions per place. [2024-06-03 20:27:31,820 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 565 selfloop transitions, 48 changer transitions 0/618 dead transitions. [2024-06-03 20:27:31,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 11351 flow [2024-06-03 20:27:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:27:31,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 20:27:31,821 INFO L175 Difference]: Start difference. First operand has 423 places, 592 transitions, 9919 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:27:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 11351 flow [2024-06-03 20:27:40,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 11035 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:27:40,765 INFO L231 Difference]: Finished difference. Result has 425 places, 595 transitions, 9835 flow [2024-06-03 20:27:40,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9603, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9835, PETRI_PLACES=425, PETRI_TRANSITIONS=595} [2024-06-03 20:27:40,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-03 20:27:40,766 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 595 transitions, 9835 flow [2024-06-03 20:27:40,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:40,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:40,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:40,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:27:40,767 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:40,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash -446136336, now seen corresponding path program 4 times [2024-06-03 20:27:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960975932] [2024-06-03 20:27:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:40,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:41,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960975932] [2024-06-03 20:27:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960975932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:41,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:27:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643246858] [2024-06-03 20:27:41,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:27:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:27:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:27:41,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:27:41,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 595 transitions, 9835 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:41,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:41,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:27:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:43,371 INFO L124 PetriNetUnfolderBase]: 4165/6571 cut-off events. [2024-06-03 20:27:43,371 INFO L125 PetriNetUnfolderBase]: For 1405864/1405864 co-relation queries the response was YES. [2024-06-03 20:27:43,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64560 conditions, 6571 events. 4165/6571 cut-off events. For 1405864/1405864 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 40568 event pairs, 938 based on Foata normal form. 2/6554 useless extension candidates. Maximal degree in co-relation 64360. Up to 6065 conditions per place. [2024-06-03 20:27:43,465 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 557 selfloop transitions, 55 changer transitions 0/617 dead transitions. [2024-06-03 20:27:43,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 617 transitions, 11224 flow [2024-06-03 20:27:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:27:43,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 20:27:43,466 INFO L175 Difference]: Start difference. First operand has 425 places, 595 transitions, 9835 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:27:43,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 617 transitions, 11224 flow [2024-06-03 20:27:50,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 617 transitions, 10983 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 20:27:50,776 INFO L231 Difference]: Finished difference. Result has 426 places, 598 transitions, 9804 flow [2024-06-03 20:27:50,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9804, PETRI_PLACES=426, PETRI_TRANSITIONS=598} [2024-06-03 20:27:50,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-03 20:27:50,776 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 598 transitions, 9804 flow [2024-06-03 20:27:50,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:50,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:50,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:27:50,777 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:50,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1259112487, now seen corresponding path program 3 times [2024-06-03 20:27:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914916418] [2024-06-03 20:27:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914916418] [2024-06-03 20:27:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914916418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:51,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:27:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631862474] [2024-06-03 20:27:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:51,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:27:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:27:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:27:51,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:27:51,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 598 transitions, 9804 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:51,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:27:51,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:53,662 INFO L124 PetriNetUnfolderBase]: 4317/6812 cut-off events. [2024-06-03 20:27:53,662 INFO L125 PetriNetUnfolderBase]: For 1421733/1421736 co-relation queries the response was YES. [2024-06-03 20:27:53,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66893 conditions, 6812 events. 4317/6812 cut-off events. For 1421733/1421736 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42155 event pairs, 908 based on Foata normal form. 1/6800 useless extension candidates. Maximal degree in co-relation 66692. Up to 6197 conditions per place. [2024-06-03 20:27:53,767 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 582 selfloop transitions, 86 changer transitions 0/673 dead transitions. [2024-06-03 20:27:53,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 673 transitions, 12287 flow [2024-06-03 20:27:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:27:53,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 20:27:53,768 INFO L175 Difference]: Start difference. First operand has 426 places, 598 transitions, 9804 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:27:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 673 transitions, 12287 flow [2024-06-03 20:28:00,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 673 transitions, 12065 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:28:00,947 INFO L231 Difference]: Finished difference. Result has 433 places, 646 transitions, 10869 flow [2024-06-03 20:28:00,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9639, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10869, PETRI_PLACES=433, PETRI_TRANSITIONS=646} [2024-06-03 20:28:00,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-03 20:28:00,948 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 646 transitions, 10869 flow [2024-06-03 20:28:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:00,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:00,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:28:00,949 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:00,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1866443278, now seen corresponding path program 5 times [2024-06-03 20:28:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830592953] [2024-06-03 20:28:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:00,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:01,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830592953] [2024-06-03 20:28:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830592953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:01,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:01,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312547440] [2024-06-03 20:28:01,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:01,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:01,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:01,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 646 transitions, 10869 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:01,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:01,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:01,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:03,627 INFO L124 PetriNetUnfolderBase]: 4327/6814 cut-off events. [2024-06-03 20:28:03,627 INFO L125 PetriNetUnfolderBase]: For 1451478/1451478 co-relation queries the response was YES. [2024-06-03 20:28:03,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67412 conditions, 6814 events. 4327/6814 cut-off events. For 1451478/1451478 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42158 event pairs, 945 based on Foata normal form. 2/6789 useless extension candidates. Maximal degree in co-relation 67206. Up to 6086 conditions per place. [2024-06-03 20:28:03,736 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 552 selfloop transitions, 109 changer transitions 0/666 dead transitions. [2024-06-03 20:28:03,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 666 transitions, 12618 flow [2024-06-03 20:28:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:28:03,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 20:28:03,737 INFO L175 Difference]: Start difference. First operand has 433 places, 646 transitions, 10869 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:28:03,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 666 transitions, 12618 flow [2024-06-03 20:28:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 666 transitions, 12455 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-03 20:28:10,700 INFO L231 Difference]: Finished difference. Result has 439 places, 649 transitions, 11023 flow [2024-06-03 20:28:10,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10706, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11023, PETRI_PLACES=439, PETRI_TRANSITIONS=649} [2024-06-03 20:28:10,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-03 20:28:10,700 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 649 transitions, 11023 flow [2024-06-03 20:28:10,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:10,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:10,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:28:10,701 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:10,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash 69249692, now seen corresponding path program 6 times [2024-06-03 20:28:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295678910] [2024-06-03 20:28:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:11,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:11,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295678910] [2024-06-03 20:28:11,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295678910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:11,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:11,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087763280] [2024-06-03 20:28:11,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:11,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:11,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:11,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:11,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 649 transitions, 11023 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:11,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:11,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:11,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:13,579 INFO L124 PetriNetUnfolderBase]: 4321/6812 cut-off events. [2024-06-03 20:28:13,579 INFO L125 PetriNetUnfolderBase]: For 1456750/1456750 co-relation queries the response was YES. [2024-06-03 20:28:13,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67337 conditions, 6812 events. 4321/6812 cut-off events. For 1456750/1456750 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42177 event pairs, 906 based on Foata normal form. 2/6787 useless extension candidates. Maximal degree in co-relation 67129. Up to 6081 conditions per place. [2024-06-03 20:28:13,676 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 555 selfloop transitions, 105 changer transitions 0/665 dead transitions. [2024-06-03 20:28:13,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 665 transitions, 12413 flow [2024-06-03 20:28:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:28:13,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 20:28:13,677 INFO L175 Difference]: Start difference. First operand has 439 places, 649 transitions, 11023 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:28:13,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 665 transitions, 12413 flow [2024-06-03 20:28:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 665 transitions, 12059 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-03 20:28:21,963 INFO L231 Difference]: Finished difference. Result has 441 places, 649 transitions, 10888 flow [2024-06-03 20:28:21,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10888, PETRI_PLACES=441, PETRI_TRANSITIONS=649} [2024-06-03 20:28:21,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-03 20:28:21,963 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 649 transitions, 10888 flow [2024-06-03 20:28:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:21,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:21,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:28:21,964 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:21,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1351626136, now seen corresponding path program 7 times [2024-06-03 20:28:21,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:21,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465757882] [2024-06-03 20:28:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:22,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465757882] [2024-06-03 20:28:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465757882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993211828] [2024-06-03 20:28:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:22,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:22,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 649 transitions, 10888 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:22,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:22,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:22,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:24,713 INFO L124 PetriNetUnfolderBase]: 4357/6847 cut-off events. [2024-06-03 20:28:24,714 INFO L125 PetriNetUnfolderBase]: For 1513116/1513119 co-relation queries the response was YES. [2024-06-03 20:28:24,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68168 conditions, 6847 events. 4357/6847 cut-off events. For 1513116/1513119 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42312 event pairs, 930 based on Foata normal form. 4/6831 useless extension candidates. Maximal degree in co-relation 67959. Up to 5369 conditions per place. [2024-06-03 20:28:24,825 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 373 selfloop transitions, 297 changer transitions 0/675 dead transitions. [2024-06-03 20:28:24,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 675 transitions, 13360 flow [2024-06-03 20:28:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:28:24,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 20:28:24,826 INFO L175 Difference]: Start difference. First operand has 441 places, 649 transitions, 10888 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:28:24,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 675 transitions, 13360 flow [2024-06-03 20:28:32,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 675 transitions, 13118 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:28:32,193 INFO L231 Difference]: Finished difference. Result has 442 places, 658 transitions, 11512 flow [2024-06-03 20:28:32,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10646, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11512, PETRI_PLACES=442, PETRI_TRANSITIONS=658} [2024-06-03 20:28:32,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-03 20:28:32,194 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 658 transitions, 11512 flow [2024-06-03 20:28:32,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:32,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:32,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:32,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:28:32,195 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:32,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1346864536, now seen corresponding path program 8 times [2024-06-03 20:28:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:32,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951342665] [2024-06-03 20:28:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:32,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951342665] [2024-06-03 20:28:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951342665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:33,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461431767] [2024-06-03 20:28:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:33,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:33,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 658 transitions, 11512 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:33,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:33,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:33,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:34,825 INFO L124 PetriNetUnfolderBase]: 4403/6938 cut-off events. [2024-06-03 20:28:34,825 INFO L125 PetriNetUnfolderBase]: For 1557213/1557213 co-relation queries the response was YES. [2024-06-03 20:28:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69943 conditions, 6938 events. 4403/6938 cut-off events. For 1557213/1557213 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43048 event pairs, 920 based on Foata normal form. 4/6934 useless extension candidates. Maximal degree in co-relation 69733. Up to 6509 conditions per place. [2024-06-03 20:28:34,939 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 629 selfloop transitions, 53 changer transitions 0/687 dead transitions. [2024-06-03 20:28:34,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 687 transitions, 13596 flow [2024-06-03 20:28:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:28:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:28:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:28:34,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-03 20:28:34,940 INFO L175 Difference]: Start difference. First operand has 442 places, 658 transitions, 11512 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:28:34,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 687 transitions, 13596 flow [2024-06-03 20:28:42,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 687 transitions, 12824 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-03 20:28:42,868 INFO L231 Difference]: Finished difference. Result has 447 places, 673 transitions, 11288 flow [2024-06-03 20:28:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11288, PETRI_PLACES=447, PETRI_TRANSITIONS=673} [2024-06-03 20:28:42,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-03 20:28:42,869 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 673 transitions, 11288 flow [2024-06-03 20:28:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:42,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:42,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:42,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:28:42,869 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash 947367226, now seen corresponding path program 9 times [2024-06-03 20:28:42,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:42,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299119465] [2024-06-03 20:28:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:42,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:43,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:43,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299119465] [2024-06-03 20:28:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299119465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:43,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910882352] [2024-06-03 20:28:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:43,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:43,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:43,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 673 transitions, 11288 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:43,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:43,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:45,754 INFO L124 PetriNetUnfolderBase]: 4439/6988 cut-off events. [2024-06-03 20:28:45,754 INFO L125 PetriNetUnfolderBase]: For 1592290/1592290 co-relation queries the response was YES. [2024-06-03 20:28:45,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70046 conditions, 6988 events. 4439/6988 cut-off events. For 1592290/1592290 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 43360 event pairs, 921 based on Foata normal form. 4/6984 useless extension candidates. Maximal degree in co-relation 69834. Up to 6472 conditions per place. [2024-06-03 20:28:45,858 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 618 selfloop transitions, 76 changer transitions 0/699 dead transitions. [2024-06-03 20:28:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 699 transitions, 13551 flow [2024-06-03 20:28:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:28:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:28:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:28:45,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-03 20:28:45,859 INFO L175 Difference]: Start difference. First operand has 447 places, 673 transitions, 11288 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:28:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 699 transitions, 13551 flow [2024-06-03 20:28:56,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 699 transitions, 13317 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 20:28:56,325 INFO L231 Difference]: Finished difference. Result has 453 places, 681 transitions, 11495 flow [2024-06-03 20:28:56,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11495, PETRI_PLACES=453, PETRI_TRANSITIONS=681} [2024-06-03 20:28:56,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-03 20:28:56,325 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 681 transitions, 11495 flow [2024-06-03 20:28:56,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:56,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:56,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:56,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:28:56,326 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:56,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1861040976, now seen corresponding path program 10 times [2024-06-03 20:28:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688843300] [2024-06-03 20:28:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688843300] [2024-06-03 20:28:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688843300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:57,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:57,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728328074] [2024-06-03 20:28:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:57,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:57,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:28:57,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 681 transitions, 11495 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:57,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:57,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:28:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:59,167 INFO L124 PetriNetUnfolderBase]: 4449/7003 cut-off events. [2024-06-03 20:28:59,168 INFO L125 PetriNetUnfolderBase]: For 1600967/1600970 co-relation queries the response was YES. [2024-06-03 20:28:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70360 conditions, 7003 events. 4449/7003 cut-off events. For 1600967/1600970 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43520 event pairs, 941 based on Foata normal form. 2/6985 useless extension candidates. Maximal degree in co-relation 70146. Up to 5443 conditions per place. [2024-06-03 20:28:59,282 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 298 changer transitions 0/702 dead transitions. [2024-06-03 20:28:59,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 702 transitions, 13887 flow [2024-06-03 20:28:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:28:59,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:28:59,283 INFO L175 Difference]: Start difference. First operand has 453 places, 681 transitions, 11495 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:28:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 702 transitions, 13887 flow [2024-06-03 20:29:08,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 702 transitions, 13498 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-03 20:29:08,582 INFO L231 Difference]: Finished difference. Result has 454 places, 685 transitions, 11818 flow [2024-06-03 20:29:08,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11818, PETRI_PLACES=454, PETRI_TRANSITIONS=685} [2024-06-03 20:29:08,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-03 20:29:08,583 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 685 transitions, 11818 flow [2024-06-03 20:29:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:08,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:29:08,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:29:08,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:29:08,583 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:29:08,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:29:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1860625266, now seen corresponding path program 11 times [2024-06-03 20:29:08,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:29:08,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524884989] [2024-06-03 20:29:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:29:08,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:29:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:29:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:29:09,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:29:09,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524884989] [2024-06-03 20:29:09,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524884989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:29:09,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:29:09,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:29:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773625538] [2024-06-03 20:29:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:29:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:29:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:29:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:29:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:29:09,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:29:09,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 685 transitions, 11818 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:29:09,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:29:09,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:29:11,268 INFO L124 PetriNetUnfolderBase]: 4443/6989 cut-off events. [2024-06-03 20:29:11,268 INFO L125 PetriNetUnfolderBase]: For 1606069/1606072 co-relation queries the response was YES. [2024-06-03 20:29:11,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70596 conditions, 6989 events. 4443/6989 cut-off events. For 1606069/1606072 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43360 event pairs, 953 based on Foata normal form. 2/6971 useless extension candidates. Maximal degree in co-relation 70382. Up to 5440 conditions per place. [2024-06-03 20:29:11,382 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 398 selfloop transitions, 299 changer transitions 0/702 dead transitions. [2024-06-03 20:29:11,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 702 transitions, 14108 flow [2024-06-03 20:29:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:29:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:29:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:29:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 20:29:11,383 INFO L175 Difference]: Start difference. First operand has 454 places, 685 transitions, 11818 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:29:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 702 transitions, 14108 flow [2024-06-03 20:29:20,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 702 transitions, 13513 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-03 20:29:20,400 INFO L231 Difference]: Finished difference. Result has 458 places, 685 transitions, 11827 flow [2024-06-03 20:29:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11827, PETRI_PLACES=458, PETRI_TRANSITIONS=685} [2024-06-03 20:29:20,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-03 20:29:20,401 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 685 transitions, 11827 flow [2024-06-03 20:29:20,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:20,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:29:20,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:29:20,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:29:20,401 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:29:20,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:29:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1839788436, now seen corresponding path program 12 times [2024-06-03 20:29:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:29:20,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083900435] [2024-06-03 20:29:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:29:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:29:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:29:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:29:21,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:29:21,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083900435] [2024-06-03 20:29:21,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083900435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:29:21,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:29:21,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:29:21,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031593642] [2024-06-03 20:29:21,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:29:21,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:29:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:29:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:29:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:29:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:29:21,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 685 transitions, 11827 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:29:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:29:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:29:23,296 INFO L124 PetriNetUnfolderBase]: 4437/6990 cut-off events. [2024-06-03 20:29:23,296 INFO L125 PetriNetUnfolderBase]: For 1605107/1605107 co-relation queries the response was YES. [2024-06-03 20:29:23,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70331 conditions, 6990 events. 4437/6990 cut-off events. For 1605107/1605107 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43356 event pairs, 916 based on Foata normal form. 2/6984 useless extension candidates. Maximal degree in co-relation 70116. Up to 6475 conditions per place. [2024-06-03 20:29:23,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 617 selfloop transitions, 78 changer transitions 0/700 dead transitions. [2024-06-03 20:29:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 700 transitions, 13555 flow [2024-06-03 20:29:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:29:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:29:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:29:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-03 20:29:23,407 INFO L175 Difference]: Start difference. First operand has 458 places, 685 transitions, 11827 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:29:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 700 transitions, 13555 flow [2024-06-03 20:29:32,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 700 transitions, 12803 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:29:32,682 INFO L231 Difference]: Finished difference. Result has 460 places, 685 transitions, 11238 flow [2024-06-03 20:29:32,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11075, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11238, PETRI_PLACES=460, PETRI_TRANSITIONS=685} [2024-06-03 20:29:32,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-03 20:29:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 685 transitions, 11238 flow [2024-06-03 20:29:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:32,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:29:32,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:29:32,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:29:32,684 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:29:32,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:29:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash 355244808, now seen corresponding path program 1 times [2024-06-03 20:29:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:29:32,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717661009] [2024-06-03 20:29:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:29:32,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:29:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:29:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:29:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:29:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717661009] [2024-06-03 20:29:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717661009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:29:33,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:29:33,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:29:33,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703137173] [2024-06-03 20:29:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:29:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:29:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:29:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:29:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:29:33,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:29:33,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 685 transitions, 11238 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:33,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:29:33,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:29:33,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:29:35,267 INFO L124 PetriNetUnfolderBase]: 4445/6998 cut-off events. [2024-06-03 20:29:35,267 INFO L125 PetriNetUnfolderBase]: For 1621722/1621722 co-relation queries the response was YES. [2024-06-03 20:29:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69713 conditions, 6998 events. 4445/6998 cut-off events. For 1621722/1621722 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43364 event pairs, 804 based on Foata normal form. 2/6985 useless extension candidates. Maximal degree in co-relation 69497. Up to 6547 conditions per place. [2024-06-03 20:29:35,382 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 668 selfloop transitions, 29 changer transitions 0/702 dead transitions. [2024-06-03 20:29:35,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 702 transitions, 12720 flow [2024-06-03 20:29:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:29:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:29:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:29:35,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-03 20:29:35,383 INFO L175 Difference]: Start difference. First operand has 460 places, 685 transitions, 11238 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:29:35,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 702 transitions, 12720 flow [2024-06-03 20:29:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 702 transitions, 12337 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 20:29:46,487 INFO L231 Difference]: Finished difference. Result has 458 places, 687 transitions, 10966 flow [2024-06-03 20:29:46,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10966, PETRI_PLACES=458, PETRI_TRANSITIONS=687} [2024-06-03 20:29:46,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-03 20:29:46,487 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 687 transitions, 10966 flow [2024-06-03 20:29:46,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:46,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:29:46,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:29:46,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:29:46,488 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:29:46,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:29:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1793043602, now seen corresponding path program 2 times [2024-06-03 20:29:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:29:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113630171] [2024-06-03 20:29:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:29:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:29:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:29:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:29:47,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:29:47,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113630171] [2024-06-03 20:29:47,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113630171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:29:47,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:29:47,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:29:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489414621] [2024-06-03 20:29:47,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:29:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:29:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:29:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:29:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:29:47,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:29:47,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 687 transitions, 10966 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:47,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:29:47,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:29:47,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:29:49,376 INFO L124 PetriNetUnfolderBase]: 4435/6984 cut-off events. [2024-06-03 20:29:49,377 INFO L125 PetriNetUnfolderBase]: For 1617239/1617239 co-relation queries the response was YES. [2024-06-03 20:29:49,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68598 conditions, 6984 events. 4435/6984 cut-off events. For 1617239/1617239 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43269 event pairs, 923 based on Foata normal form. 4/6973 useless extension candidates. Maximal degree in co-relation 68382. Up to 6468 conditions per place. [2024-06-03 20:29:49,481 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 638 selfloop transitions, 62 changer transitions 0/705 dead transitions. [2024-06-03 20:29:49,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 705 transitions, 12527 flow [2024-06-03 20:29:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:29:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:29:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:29:49,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 20:29:49,482 INFO L175 Difference]: Start difference. First operand has 458 places, 687 transitions, 10966 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:29:49,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 705 transitions, 12527 flow [2024-06-03 20:29:59,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 705 transitions, 12432 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:29:59,692 INFO L231 Difference]: Finished difference. Result has 461 places, 694 transitions, 11163 flow [2024-06-03 20:29:59,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10871, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11163, PETRI_PLACES=461, PETRI_TRANSITIONS=694} [2024-06-03 20:29:59,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-03 20:29:59,692 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 694 transitions, 11163 flow [2024-06-03 20:29:59,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:59,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:29:59,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:29:59,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:29:59,693 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:29:59,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:29:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2025497394, now seen corresponding path program 1 times [2024-06-03 20:29:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:29:59,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641151657] [2024-06-03 20:29:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:29:59,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:29:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:30:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:30:00,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:30:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641151657] [2024-06-03 20:30:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641151657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:30:00,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:30:00,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:30:00,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045782557] [2024-06-03 20:30:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:30:00,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:30:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:30:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:30:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:30:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:30:00,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 694 transitions, 11163 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:30:00,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:30:00,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:30:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:30:02,726 INFO L124 PetriNetUnfolderBase]: 4501/7096 cut-off events. [2024-06-03 20:30:02,726 INFO L125 PetriNetUnfolderBase]: For 1740582/1740582 co-relation queries the response was YES. [2024-06-03 20:30:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71107 conditions, 7096 events. 4501/7096 cut-off events. For 1740582/1740582 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44156 event pairs, 924 based on Foata normal form. 6/7094 useless extension candidates. Maximal degree in co-relation 70889. Up to 6534 conditions per place. [2024-06-03 20:30:02,843 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 653 selfloop transitions, 59 changer transitions 0/717 dead transitions. [2024-06-03 20:30:02,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 717 transitions, 13082 flow [2024-06-03 20:30:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:30:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:30:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:30:02,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 20:30:02,844 INFO L175 Difference]: Start difference. First operand has 461 places, 694 transitions, 11163 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:30:02,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 717 transitions, 13082 flow [2024-06-03 20:30:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 717 transitions, 12915 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-03 20:30:12,731 INFO L231 Difference]: Finished difference. Result has 467 places, 696 transitions, 11202 flow [2024-06-03 20:30:12,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11010, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11202, PETRI_PLACES=467, PETRI_TRANSITIONS=696} [2024-06-03 20:30:12,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-03 20:30:12,732 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 696 transitions, 11202 flow [2024-06-03 20:30:12,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:30:12,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:30:12,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:30:12,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:30:12,733 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:30:12,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:30:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1595066866, now seen corresponding path program 2 times [2024-06-03 20:30:12,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:30:12,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920131506] [2024-06-03 20:30:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:30:12,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:30:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:30:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:30:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:30:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920131506] [2024-06-03 20:30:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920131506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:30:14,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:30:14,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:30:14,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237217044] [2024-06-03 20:30:14,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:30:14,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:30:14,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:30:14,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:30:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:30:14,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:30:14,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 696 transitions, 11202 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:30:14,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:30:14,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:30:14,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:30:16,018 INFO L124 PetriNetUnfolderBase]: 4491/7076 cut-off events. [2024-06-03 20:30:16,018 INFO L125 PetriNetUnfolderBase]: For 1707010/1707010 co-relation queries the response was YES. [2024-06-03 20:30:16,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69901 conditions, 7076 events. 4491/7076 cut-off events. For 1707010/1707010 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43985 event pairs, 931 based on Foata normal form. 8/7076 useless extension candidates. Maximal degree in co-relation 69681. Up to 6616 conditions per place. [2024-06-03 20:30:16,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 652 selfloop transitions, 57 changer transitions 0/714 dead transitions. [2024-06-03 20:30:16,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 714 transitions, 12722 flow [2024-06-03 20:30:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:30:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:30:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-03 20:30:16,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-03 20:30:16,132 INFO L175 Difference]: Start difference. First operand has 467 places, 696 transitions, 11202 flow. Second operand 10 states and 163 transitions. [2024-06-03 20:30:16,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 714 transitions, 12722 flow [2024-06-03 20:30:27,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 714 transitions, 12617 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 20:30:27,440 INFO L231 Difference]: Finished difference. Result has 473 places, 698 transitions, 11241 flow [2024-06-03 20:30:27,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11097, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11241, PETRI_PLACES=473, PETRI_TRANSITIONS=698} [2024-06-03 20:30:27,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-03 20:30:27,441 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 698 transitions, 11241 flow [2024-06-03 20:30:27,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:30:27,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:30:27,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:30:27,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:30:27,441 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:30:27,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:30:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -795212619, now seen corresponding path program 4 times [2024-06-03 20:30:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:30:27,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257776820] [2024-06-03 20:30:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:30:27,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:30:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:30:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:30:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:30:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257776820] [2024-06-03 20:30:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257776820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:30:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:30:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:30:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282839733] [2024-06-03 20:30:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:30:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:30:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:30:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:30:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:30:28,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:30:28,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 698 transitions, 11241 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:30:28,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:30:28,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:30:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:30:30,380 INFO L124 PetriNetUnfolderBase]: 4496/7081 cut-off events. [2024-06-03 20:30:30,380 INFO L125 PetriNetUnfolderBase]: For 1657229/1657229 co-relation queries the response was YES. [2024-06-03 20:30:30,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70039 conditions, 7081 events. 4496/7081 cut-off events. For 1657229/1657229 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 44054 event pairs, 941 based on Foata normal form. 1/7067 useless extension candidates. Maximal degree in co-relation 69817. Up to 6487 conditions per place. [2024-06-03 20:30:30,503 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 646 selfloop transitions, 70 changer transitions 0/721 dead transitions. [2024-06-03 20:30:30,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 721 transitions, 12878 flow [2024-06-03 20:30:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:30:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:30:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:30:30,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 20:30:30,504 INFO L175 Difference]: Start difference. First operand has 473 places, 698 transitions, 11241 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:30:30,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 721 transitions, 12878 flow [2024-06-03 20:30:42,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 721 transitions, 12773 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:30:42,534 INFO L231 Difference]: Finished difference. Result has 474 places, 701 transitions, 11423 flow [2024-06-03 20:30:42,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11136, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11423, PETRI_PLACES=474, PETRI_TRANSITIONS=701} [2024-06-03 20:30:42,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-03 20:30:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 701 transitions, 11423 flow [2024-06-03 20:30:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:30:42,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:30:42,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:30:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:30:42,535 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:30:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:30:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1479168867, now seen corresponding path program 5 times [2024-06-03 20:30:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:30:42,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676918845] [2024-06-03 20:30:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:30:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:30:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:30:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:30:43,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:30:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676918845] [2024-06-03 20:30:43,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676918845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:30:43,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:30:43,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:30:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226180537] [2024-06-03 20:30:43,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:30:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:30:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:30:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:30:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:30:43,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:30:43,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 701 transitions, 11423 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:30:43,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:30:43,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:30:43,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:30:45,583 INFO L124 PetriNetUnfolderBase]: 4501/7079 cut-off events. [2024-06-03 20:30:45,583 INFO L125 PetriNetUnfolderBase]: For 1681300/1681300 co-relation queries the response was YES. [2024-06-03 20:30:45,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70458 conditions, 7079 events. 4501/7079 cut-off events. For 1681300/1681300 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 44011 event pairs, 961 based on Foata normal form. 1/7053 useless extension candidates. Maximal degree in co-relation 70235. Up to 6483 conditions per place. [2024-06-03 20:30:45,702 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 639 selfloop transitions, 78 changer transitions 0/722 dead transitions. [2024-06-03 20:30:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 722 transitions, 13066 flow [2024-06-03 20:30:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:30:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:30:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:30:45,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 20:30:45,703 INFO L175 Difference]: Start difference. First operand has 474 places, 701 transitions, 11423 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:30:45,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 722 transitions, 13066 flow [2024-06-03 20:30:57,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 722 transitions, 12813 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-03 20:30:57,204 INFO L231 Difference]: Finished difference. Result has 476 places, 704 transitions, 11479 flow [2024-06-03 20:30:57,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11176, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11479, PETRI_PLACES=476, PETRI_TRANSITIONS=704} [2024-06-03 20:30:57,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-03 20:30:57,205 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 704 transitions, 11479 flow [2024-06-03 20:30:57,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:30:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:30:57,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:30:57,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:30:57,205 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:30:57,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:30:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1017727865, now seen corresponding path program 6 times [2024-06-03 20:30:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:30:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8990077] [2024-06-03 20:30:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:30:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:30:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:30:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:30:58,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:30:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8990077] [2024-06-03 20:30:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8990077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:30:58,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:30:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:30:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688670155] [2024-06-03 20:30:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:30:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:30:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:30:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:30:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:30:58,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:30:58,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 704 transitions, 11479 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:30:58,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:30:58,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:30:58,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:31:00,620 INFO L124 PetriNetUnfolderBase]: 4503/7086 cut-off events. [2024-06-03 20:31:00,620 INFO L125 PetriNetUnfolderBase]: For 1681203/1681203 co-relation queries the response was YES. [2024-06-03 20:31:00,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70295 conditions, 7086 events. 4503/7086 cut-off events. For 1681203/1681203 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 44018 event pairs, 939 based on Foata normal form. 2/7061 useless extension candidates. Maximal degree in co-relation 70071. Up to 6275 conditions per place. [2024-06-03 20:31:00,731 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 589 selfloop transitions, 130 changer transitions 0/724 dead transitions. [2024-06-03 20:31:00,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 724 transitions, 13370 flow [2024-06-03 20:31:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:31:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:31:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:31:00,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 20:31:00,732 INFO L175 Difference]: Start difference. First operand has 476 places, 704 transitions, 11479 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:31:00,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 724 transitions, 13370 flow [2024-06-03 20:31:13,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 724 transitions, 13044 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-03 20:31:13,078 INFO L231 Difference]: Finished difference. Result has 479 places, 707 transitions, 11592 flow [2024-06-03 20:31:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11155, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11592, PETRI_PLACES=479, PETRI_TRANSITIONS=707} [2024-06-03 20:31:13,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-03 20:31:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 707 transitions, 11592 flow [2024-06-03 20:31:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:31:13,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:31:13,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:31:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:31:13,079 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:31:13,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:31:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash -78998774, now seen corresponding path program 3 times [2024-06-03 20:31:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:31:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719727585] [2024-06-03 20:31:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:31:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:31:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:31:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:31:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:31:14,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719727585] [2024-06-03 20:31:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719727585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:31:14,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:31:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:31:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988551779] [2024-06-03 20:31:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:31:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:31:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:31:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:31:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:31:14,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:31:14,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 707 transitions, 11592 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:31:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:31:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:31:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:31:16,258 INFO L124 PetriNetUnfolderBase]: 4814/7617 cut-off events. [2024-06-03 20:31:16,258 INFO L125 PetriNetUnfolderBase]: For 2155608/2155611 co-relation queries the response was YES. [2024-06-03 20:31:16,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78919 conditions, 7617 events. 4814/7617 cut-off events. For 2155608/2155611 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 48043 event pairs, 1012 based on Foata normal form. 18/7615 useless extension candidates. Maximal degree in co-relation 78693. Up to 5320 conditions per place. [2024-06-03 20:31:16,391 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 286 changer transitions 0/745 dead transitions. [2024-06-03 20:31:16,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 745 transitions, 14720 flow [2024-06-03 20:31:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:31:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:31:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:31:16,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 20:31:16,393 INFO L175 Difference]: Start difference. First operand has 479 places, 707 transitions, 11592 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:31:16,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 745 transitions, 14720 flow [2024-06-03 20:31:27,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 745 transitions, 14490 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 20:31:27,253 INFO L231 Difference]: Finished difference. Result has 486 places, 716 transitions, 12313 flow [2024-06-03 20:31:27,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11370, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12313, PETRI_PLACES=486, PETRI_TRANSITIONS=716} [2024-06-03 20:31:27,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-03 20:31:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 716 transitions, 12313 flow [2024-06-03 20:31:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:31:27,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:31:27,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:31:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:31:27,254 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:31:27,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:31:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1186104074, now seen corresponding path program 4 times [2024-06-03 20:31:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:31:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622264401] [2024-06-03 20:31:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:31:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:31:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:31:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:31:28,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:31:28,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622264401] [2024-06-03 20:31:28,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622264401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:31:28,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:31:28,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:31:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190702946] [2024-06-03 20:31:28,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:31:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:31:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:31:28,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:31:28,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:31:28,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:31:28,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 716 transitions, 12313 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:31:28,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:31:28,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:31:28,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:31:30,998 INFO L124 PetriNetUnfolderBase]: 5060/7999 cut-off events. [2024-06-03 20:31:30,999 INFO L125 PetriNetUnfolderBase]: For 2462496/2462499 co-relation queries the response was YES. [2024-06-03 20:31:31,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87689 conditions, 7999 events. 5060/7999 cut-off events. For 2462496/2462499 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 50740 event pairs, 1090 based on Foata normal form. 18/7997 useless extension candidates. Maximal degree in co-relation 87460. Up to 6173 conditions per place. [2024-06-03 20:31:31,136 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 468 selfloop transitions, 277 changer transitions 0/750 dead transitions. [2024-06-03 20:31:31,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 750 transitions, 15370 flow [2024-06-03 20:31:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:31:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:31:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:31:31,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 20:31:31,137 INFO L175 Difference]: Start difference. First operand has 486 places, 716 transitions, 12313 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:31:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 750 transitions, 15370 flow [2024-06-03 20:31:43,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 750 transitions, 15036 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-03 20:31:43,517 INFO L231 Difference]: Finished difference. Result has 493 places, 723 transitions, 12801 flow [2024-06-03 20:31:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11997, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12801, PETRI_PLACES=493, PETRI_TRANSITIONS=723} [2024-06-03 20:31:43,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-03 20:31:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 723 transitions, 12801 flow [2024-06-03 20:31:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:31:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:31:43,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:31:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:31:43,518 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:31:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:31:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash 742338764, now seen corresponding path program 5 times [2024-06-03 20:31:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:31:43,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888469931] [2024-06-03 20:31:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:31:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:31:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:31:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:31:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:31:44,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888469931] [2024-06-03 20:31:44,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888469931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:31:44,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:31:44,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:31:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141766675] [2024-06-03 20:31:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:31:44,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:31:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:31:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:31:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:31:44,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:31:44,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 723 transitions, 12801 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:31:44,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:31:44,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:31:44,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:31:47,603 INFO L124 PetriNetUnfolderBase]: 5141/8146 cut-off events. [2024-06-03 20:31:47,603 INFO L125 PetriNetUnfolderBase]: For 2547082/2547085 co-relation queries the response was YES. [2024-06-03 20:31:47,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89271 conditions, 8146 events. 5141/8146 cut-off events. For 2547082/2547085 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 51962 event pairs, 1126 based on Foata normal form. 24/8150 useless extension candidates. Maximal degree in co-relation 89039. Up to 6726 conditions per place. [2024-06-03 20:31:47,734 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 501 selfloop transitions, 241 changer transitions 0/747 dead transitions. [2024-06-03 20:31:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 747 transitions, 15083 flow [2024-06-03 20:31:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:31:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:31:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:31:47,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 20:31:47,736 INFO L175 Difference]: Start difference. First operand has 493 places, 723 transitions, 12801 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:31:47,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 747 transitions, 15083 flow [2024-06-03 20:32:00,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 747 transitions, 14326 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 20:32:00,743 INFO L231 Difference]: Finished difference. Result has 495 places, 725 transitions, 12620 flow [2024-06-03 20:32:00,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12044, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12620, PETRI_PLACES=495, PETRI_TRANSITIONS=725} [2024-06-03 20:32:00,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-03 20:32:00,744 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 725 transitions, 12620 flow [2024-06-03 20:32:00,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:32:00,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:32:00,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:32:00,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:32:00,744 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:32:00,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:32:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1985633420, now seen corresponding path program 6 times [2024-06-03 20:32:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:32:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38451965] [2024-06-03 20:32:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:32:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:32:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:32:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:32:01,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:32:01,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38451965] [2024-06-03 20:32:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38451965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:32:01,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:32:01,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:32:01,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327004728] [2024-06-03 20:32:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:32:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:32:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:32:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:32:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:32:02,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:32:02,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 725 transitions, 12620 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:32:02,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:32:02,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:32:02,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:32:05,127 INFO L124 PetriNetUnfolderBase]: 5123/8109 cut-off events. [2024-06-03 20:32:05,127 INFO L125 PetriNetUnfolderBase]: For 2320856/2320856 co-relation queries the response was YES. [2024-06-03 20:32:05,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87484 conditions, 8109 events. 5123/8109 cut-off events. For 2320856/2320856 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 51590 event pairs, 1098 based on Foata normal form. 8/8109 useless extension candidates. Maximal degree in co-relation 87251. Up to 7552 conditions per place. [2024-06-03 20:32:05,275 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 669 selfloop transitions, 69 changer transitions 0/743 dead transitions. [2024-06-03 20:32:05,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 743 transitions, 14189 flow [2024-06-03 20:32:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:32:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:32:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-03 20:32:05,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-03 20:32:05,276 INFO L175 Difference]: Start difference. First operand has 495 places, 725 transitions, 12620 flow. Second operand 11 states and 178 transitions. [2024-06-03 20:32:05,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 743 transitions, 14189 flow [2024-06-03 20:32:16,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 743 transitions, 13671 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:32:16,142 INFO L231 Difference]: Finished difference. Result has 499 places, 726 transitions, 12261 flow [2024-06-03 20:32:16,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12102, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12261, PETRI_PLACES=499, PETRI_TRANSITIONS=726} [2024-06-03 20:32:16,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-03 20:32:16,143 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 726 transitions, 12261 flow [2024-06-03 20:32:16,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:32:16,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:32:16,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:32:16,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:32:16,143 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:32:16,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:32:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1528951340, now seen corresponding path program 7 times [2024-06-03 20:32:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:32:16,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699596488] [2024-06-03 20:32:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:32:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:32:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:32:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:32:17,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:32:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699596488] [2024-06-03 20:32:17,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699596488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:32:17,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:32:17,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:32:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584517743] [2024-06-03 20:32:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:32:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:32:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:32:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:32:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:32:17,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 20:32:17,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 726 transitions, 12261 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:32:17,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:32:17,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 20:32:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:32:20,283 INFO L124 PetriNetUnfolderBase]: 5256/8343 cut-off events. [2024-06-03 20:32:20,283 INFO L125 PetriNetUnfolderBase]: For 2557525/2557528 co-relation queries the response was YES. [2024-06-03 20:32:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90082 conditions, 8343 events. 5256/8343 cut-off events. For 2557525/2557528 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53441 event pairs, 1116 based on Foata normal form. 18/8341 useless extension candidates. Maximal degree in co-relation 89848. Up to 6590 conditions per place. [2024-06-03 20:32:20,425 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 242 changer transitions 0/755 dead transitions. [2024-06-03 20:32:20,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 755 transitions, 14949 flow [2024-06-03 20:32:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:32:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:32:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:32:20,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 20:32:20,426 INFO L175 Difference]: Start difference. First operand has 499 places, 726 transitions, 12261 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:32:20,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 755 transitions, 14949 flow [2024-06-03 20:32:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 755 transitions, 14811 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:32:32,896 INFO L231 Difference]: Finished difference. Result has 501 places, 729 transitions, 12770 flow [2024-06-03 20:32:32,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12123, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12770, PETRI_PLACES=501, PETRI_TRANSITIONS=729} [2024-06-03 20:32:32,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-03 20:32:32,897 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 729 transitions, 12770 flow [2024-06-03 20:32:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-03 20:32:32,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:32:32,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:32:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:32:32,898 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:32:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:32:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 887480467, now seen corresponding path program 1 times [2024-06-03 20:32:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:32:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040473772] [2024-06-03 20:32:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:32:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:32:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15