./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix028_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:13:28,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:13:28,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:13:28,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:13:29,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:13:29,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:13:29,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:13:29,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:13:29,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:13:29,021 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:13:29,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:13:29,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:13:29,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:13:29,023 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:13:29,023 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:13:29,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:13:29,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:13:29,024 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:13:29,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:13:29,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:13:29,025 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:13:29,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:13:29,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:13:29,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:13:29,027 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:13:29,027 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:13:29,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:13:29,028 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:13:29,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:13:29,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:13:29,029 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:13:29,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:13:29,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:13:29,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:13:29,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:13:29,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:13:29,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:13:29,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:13:29,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:13:29,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:13:29,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:13:29,037 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:13:29,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:13:29,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:13:29,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:13:29,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:13:29,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:13:29,389 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:13:29,389 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:13:29,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:13:30,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:13:30,848 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:13:30,849 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:13:30,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f5700ce/f08a110e18d64213ba79f64a14b43e79/FLAG6c50f391a [2024-06-28 03:13:30,883 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f5700ce/f08a110e18d64213ba79f64a14b43e79 [2024-06-28 03:13:30,886 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:13:30,886 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:13:30,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 03:13:31,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:13:31,087 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:13:31,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:13:31,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:13:31,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:13:31,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:13:30" (1/2) ... [2024-06-28 03:13:31,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d1f6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:13:31, skipping insertion in model container [2024-06-28 03:13:31,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:13:30" (1/2) ... [2024-06-28 03:13:31,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c0f2c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:13:31, skipping insertion in model container [2024-06-28 03:13:31,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:31" (2/2) ... [2024-06-28 03:13:31,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d1f6e4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31, skipping insertion in model container [2024-06-28 03:13:31,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:31" (2/2) ... [2024-06-28 03:13:31,099 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:13:31,194 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:13:31,196 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:13:31,196 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:13:31,197 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:13:31,197 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:13:31,197 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-28 03:13:31,276 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:13:31,670 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:13:31,685 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:13:31,820 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:13:31,861 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:13:31,861 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31 WrapperNode [2024-06-28 03:13:31,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:13:31,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:13:31,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:13:31,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:13:31,870 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 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:31,917 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 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:31,976 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-28 03:13:31,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:13:31,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:13:31,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:13:31,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:13:32,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,022 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]. [2024-06-28 03:13:32,023 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,023 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,036 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,046 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:13:32,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:13:32,047 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:13:32,047 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:13:32,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (1/1) ... [2024-06-28 03:13:32,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:13:32,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:13:32,081 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) [2024-06-28 03:13:32,101 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 [2024-06-28 03:13:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:13:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:13:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:13:32,131 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:13:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:13:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:13:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:13:32,132 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:13:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:13:32,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:13:32,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:13:32,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:13:32,134 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:13:32,292 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:13:32,295 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:13:32,703 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:13:32,705 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:13:32,891 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:13:32,891 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:13:32,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:13:32 BoogieIcfgContainer [2024-06-28 03:13:32,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:13:32,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:13:32,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:13:32,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:13:32,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:13:30" (1/4) ... [2024-06-28 03:13:32,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f623d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:13:32, skipping insertion in model container [2024-06-28 03:13:32,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:31" (2/4) ... [2024-06-28 03:13:32,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f623d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:13:32, skipping insertion in model container [2024-06-28 03:13:32,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:31" (3/4) ... [2024-06-28 03:13:32,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f623d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:13:32, skipping insertion in model container [2024-06-28 03:13:32,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:13:32" (4/4) ... [2024-06-28 03:13:32,903 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:13:32,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:13:32,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:13:32,920 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:13:33,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:13:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:13:33,077 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 03:13:33,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:13:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:13:33,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:13:33,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 03:13:33,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:13:33,097 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;@17f620e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:13:33,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:13:33,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:13:33,102 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:13:33,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:13:33,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:33,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:13:33,104 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)] === [2024-06-28 03:13:33,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 368241174, now seen corresponding path program 1 times [2024-06-28 03:13:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685000396] [2024-06-28 03:13:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:33,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685000396] [2024-06-28 03:13:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685000396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:34,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:34,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:13:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578360909] [2024-06-28 03:13:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:13:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:13:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:13:34,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:34,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:34,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:34,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:34,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:34,705 INFO L124 PetriNetUnfolderBase]: 1659/2537 cut-off events. [2024-06-28 03:13:34,705 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 03:13:34,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5101 conditions, 2537 events. 1659/2537 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12032 event pairs, 1184 based on Foata normal form. 1/2485 useless extension candidates. Maximal degree in co-relation 5089. Up to 2465 conditions per place. [2024-06-28 03:13:34,729 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-28 03:13:34,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-28 03:13:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:13:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:13:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-28 03:13:34,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-28 03:13:34,743 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 73 transitions. [2024-06-28 03:13:34,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-28 03:13:34,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:34,752 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 03:13:34,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 03:13:34,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 03:13:34,760 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 03:13:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:34,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:34,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:34,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:13:34,761 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)] === [2024-06-28 03:13:34,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1692467381, now seen corresponding path program 1 times [2024-06-28 03:13:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:34,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137488925] [2024-06-28 03:13:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:35,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:35,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137488925] [2024-06-28 03:13:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137488925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:35,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:13:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430881040] [2024-06-28 03:13:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:35,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:13:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:13:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:13:35,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:35,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:35,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:35,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:35,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:35,942 INFO L124 PetriNetUnfolderBase]: 1653/2528 cut-off events. [2024-06-28 03:13:35,943 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-28 03:13:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2528 events. 1653/2528 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12035 event pairs, 1038 based on Foata normal form. 3/2518 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-28 03:13:35,962 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-28 03:13:35,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-28 03:13:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:13:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:13:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-28 03:13:35,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-28 03:13:35,967 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 94 transitions. [2024-06-28 03:13:35,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-28 03:13:35,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:13:35,970 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-28 03:13:35,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 03:13:35,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-28 03:13:35,972 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-28 03:13:35,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:35,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:35,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:35,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:13:35,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:35,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash 926881865, now seen corresponding path program 1 times [2024-06-28 03:13:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:35,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532126026] [2024-06-28 03:13:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:35,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532126026] [2024-06-28 03:13:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532126026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:36,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:36,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:13:36,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266015242] [2024-06-28 03:13:36,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:13:36,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:13:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:13:36,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:36,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:36,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:36,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:36,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:37,264 INFO L124 PetriNetUnfolderBase]: 1661/2558 cut-off events. [2024-06-28 03:13:37,264 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-28 03:13:37,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6384 conditions, 2558 events. 1661/2558 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12206 event pairs, 812 based on Foata normal form. 5/2562 useless extension candidates. Maximal degree in co-relation 6370. Up to 2387 conditions per place. [2024-06-28 03:13:37,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-28 03:13:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-28 03:13:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:13:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:13:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 03:13:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 03:13:37,283 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 123 transitions. [2024-06-28 03:13:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-28 03:13:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:13:37,286 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-28 03:13:37,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-28 03:13:37,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-28 03:13:37,288 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-28 03:13:37,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:37,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:37,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:13:37,289 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)] === [2024-06-28 03:13:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -721908760, now seen corresponding path program 1 times [2024-06-28 03:13:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989010042] [2024-06-28 03:13:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:38,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989010042] [2024-06-28 03:13:38,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989010042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:38,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:38,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:13:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763223975] [2024-06-28 03:13:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:13:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:13:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:13:38,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:38,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:38,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:38,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:38,845 INFO L124 PetriNetUnfolderBase]: 1669/2570 cut-off events. [2024-06-28 03:13:38,846 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-28 03:13:38,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7503 conditions, 2570 events. 1669/2570 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12288 event pairs, 666 based on Foata normal form. 7/2576 useless extension candidates. Maximal degree in co-relation 7486. Up to 2373 conditions per place. [2024-06-28 03:13:38,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 60 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-28 03:13:38,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 521 flow [2024-06-28 03:13:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 03:13:38,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-28 03:13:38,868 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 145 transitions. [2024-06-28 03:13:38,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 521 flow [2024-06-28 03:13:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 513 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:13:38,874 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-28 03:13:38,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-28 03:13:38,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-28 03:13:38,875 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-28 03:13:38,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:38,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:38,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:13:38,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:38,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1675262408, now seen corresponding path program 1 times [2024-06-28 03:13:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:38,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40867743] [2024-06-28 03:13:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:38,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:40,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:40,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40867743] [2024-06-28 03:13:40,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40867743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:40,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:40,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504473481] [2024-06-28 03:13:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:40,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:40,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:40,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 03:13:40,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:40,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:40,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:40,794 INFO L124 PetriNetUnfolderBase]: 1681/2590 cut-off events. [2024-06-28 03:13:40,794 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-28 03:13:40,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 2590 events. 1681/2590 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12415 event pairs, 502 based on Foata normal form. 12/2601 useless extension candidates. Maximal degree in co-relation 8354. Up to 2341 conditions per place. [2024-06-28 03:13:40,815 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-28 03:13:40,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 622 flow [2024-06-28 03:13:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 03:13:40,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-28 03:13:40,818 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 7 states and 163 transitions. [2024-06-28 03:13:40,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 622 flow [2024-06-28 03:13:40,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 573 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:40,830 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 335 flow [2024-06-28 03:13:40,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-28 03:13:40,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 03:13:40,833 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 335 flow [2024-06-28 03:13:40,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-28 03:13:40,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:40,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:13:40,835 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)] === [2024-06-28 03:13:40,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1549786196, now seen corresponding path program 1 times [2024-06-28 03:13:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:40,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349199831] [2024-06-28 03:13:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:41,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:41,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349199831] [2024-06-28 03:13:41,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349199831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:41,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:41,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:13:41,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066618108] [2024-06-28 03:13:41,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:13:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:13:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:13:41,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:41,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:41,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:41,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:41,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:42,067 INFO L124 PetriNetUnfolderBase]: 1676/2579 cut-off events. [2024-06-28 03:13:42,067 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-28 03:13:42,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8897 conditions, 2579 events. 1676/2579 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12271 event pairs, 659 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 8875. Up to 2484 conditions per place. [2024-06-28 03:13:42,095 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-28 03:13:42,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 487 flow [2024-06-28 03:13:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:13:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:13:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-28 03:13:42,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 03:13:42,097 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 335 flow. Second operand 5 states and 91 transitions. [2024-06-28 03:13:42,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 487 flow [2024-06-28 03:13:42,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 423 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:42,105 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 295 flow [2024-06-28 03:13:42,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-28 03:13:42,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 03:13:42,108 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 295 flow [2024-06-28 03:13:42,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:42,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:42,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:13:42,109 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)] === [2024-06-28 03:13:42,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 798329682, now seen corresponding path program 1 times [2024-06-28 03:13:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:42,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086694890] [2024-06-28 03:13:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086694890] [2024-06-28 03:13:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086694890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519776124] [2024-06-28 03:13:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:42,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:42,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:42,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:42,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:43,501 INFO L124 PetriNetUnfolderBase]: 1932/2871 cut-off events. [2024-06-28 03:13:43,502 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-28 03:13:43,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10013 conditions, 2871 events. 1932/2871 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13034 event pairs, 727 based on Foata normal form. 6/2876 useless extension candidates. Maximal degree in co-relation 9989. Up to 2802 conditions per place. [2024-06-28 03:13:43,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-06-28 03:13:43,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 589 flow [2024-06-28 03:13:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:13:43,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 03:13:43,524 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 295 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:13:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 589 flow [2024-06-28 03:13:43,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 567 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:43,532 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 404 flow [2024-06-28 03:13:43,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-28 03:13:43,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-28 03:13:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 404 flow [2024-06-28 03:13:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:43,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:43,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:43,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:13:43,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:43,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:43,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2006007427, now seen corresponding path program 1 times [2024-06-28 03:13:43,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:43,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879985244] [2024-06-28 03:13:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:43,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:44,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879985244] [2024-06-28 03:13:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879985244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:44,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647697441] [2024-06-28 03:13:44,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:44,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:44,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:44,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:44,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:44,829 INFO L124 PetriNetUnfolderBase]: 1744/2686 cut-off events. [2024-06-28 03:13:44,830 INFO L125 PetriNetUnfolderBase]: For 10832/10846 co-relation queries the response was YES. [2024-06-28 03:13:44,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 2686 events. 1744/2686 cut-off events. For 10832/10846 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12861 event pairs, 651 based on Foata normal form. 8/2678 useless extension candidates. Maximal degree in co-relation 10164. Up to 2489 conditions per place. [2024-06-28 03:13:44,849 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-28 03:13:44,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 668 flow [2024-06-28 03:13:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 03:13:44,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-28 03:13:44,851 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 404 flow. Second operand 6 states and 116 transitions. [2024-06-28 03:13:44,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 668 flow [2024-06-28 03:13:44,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 650 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 03:13:44,863 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 458 flow [2024-06-28 03:13:44,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-28 03:13:44,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-28 03:13:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 458 flow [2024-06-28 03:13:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:44,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:13:44,866 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)] === [2024-06-28 03:13:44,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1009077837, now seen corresponding path program 2 times [2024-06-28 03:13:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569135064] [2024-06-28 03:13:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:45,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569135064] [2024-06-28 03:13:45,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569135064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:45,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:45,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156160284] [2024-06-28 03:13:45,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:45,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:45,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:45,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:45,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:45,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:45,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:45,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:46,193 INFO L124 PetriNetUnfolderBase]: 1729/2660 cut-off events. [2024-06-28 03:13:46,194 INFO L125 PetriNetUnfolderBase]: For 12020/12030 co-relation queries the response was YES. [2024-06-28 03:13:46,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10270 conditions, 2660 events. 1729/2660 cut-off events. For 12020/12030 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12689 event pairs, 647 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 10241. Up to 2530 conditions per place. [2024-06-28 03:13:46,214 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-28 03:13:46,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 650 flow [2024-06-28 03:13:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:13:46,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-28 03:13:46,216 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 458 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:13:46,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 650 flow [2024-06-28 03:13:46,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 621 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:46,233 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 459 flow [2024-06-28 03:13:46,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-28 03:13:46,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-28 03:13:46,234 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 459 flow [2024-06-28 03:13:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:46,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:46,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:46,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:13:46,235 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)] === [2024-06-28 03:13:46,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -62117735, now seen corresponding path program 1 times [2024-06-28 03:13:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874454002] [2024-06-28 03:13:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874454002] [2024-06-28 03:13:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874454002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:47,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:47,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929064948] [2024-06-28 03:13:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:47,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:47,787 INFO L124 PetriNetUnfolderBase]: 2091/3095 cut-off events. [2024-06-28 03:13:47,787 INFO L125 PetriNetUnfolderBase]: For 17153/17153 co-relation queries the response was YES. [2024-06-28 03:13:47,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12368 conditions, 3095 events. 2091/3095 cut-off events. For 17153/17153 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14121 event pairs, 649 based on Foata normal form. 12/3106 useless extension candidates. Maximal degree in co-relation 12338. Up to 2721 conditions per place. [2024-06-28 03:13:47,808 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 31 changer transitions 0/121 dead transitions. [2024-06-28 03:13:47,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 985 flow [2024-06-28 03:13:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 03:13:47,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-28 03:13:47,810 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 459 flow. Second operand 7 states and 139 transitions. [2024-06-28 03:13:47,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 985 flow [2024-06-28 03:13:47,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 938 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:13:47,829 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 660 flow [2024-06-28 03:13:47,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-28 03:13:47,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-28 03:13:47,831 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 660 flow [2024-06-28 03:13:47,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:47,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:47,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:13:47,832 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)] === [2024-06-28 03:13:47,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:47,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1679359571, now seen corresponding path program 2 times [2024-06-28 03:13:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:47,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075029800] [2024-06-28 03:13:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:48,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075029800] [2024-06-28 03:13:48,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075029800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:48,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:48,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:48,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144624313] [2024-06-28 03:13:48,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:48,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:48,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:48,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:48,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:48,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:48,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:49,254 INFO L124 PetriNetUnfolderBase]: 2127/3145 cut-off events. [2024-06-28 03:13:49,254 INFO L125 PetriNetUnfolderBase]: For 22864/22864 co-relation queries the response was YES. [2024-06-28 03:13:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 3145 events. 2127/3145 cut-off events. For 22864/22864 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14321 event pairs, 700 based on Foata normal form. 6/3150 useless extension candidates. Maximal degree in co-relation 14473. Up to 3007 conditions per place. [2024-06-28 03:13:49,286 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-28 03:13:49,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1142 flow [2024-06-28 03:13:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:13:49,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-28 03:13:49,288 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 660 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:13:49,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1142 flow [2024-06-28 03:13:49,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 1098 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 03:13:49,315 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 768 flow [2024-06-28 03:13:49,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=768, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-28 03:13:49,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 03:13:49,316 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 768 flow [2024-06-28 03:13:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:49,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:49,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:13:49,317 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)] === [2024-06-28 03:13:49,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1691865281, now seen corresponding path program 3 times [2024-06-28 03:13:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:49,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825526544] [2024-06-28 03:13:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:49,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:50,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825526544] [2024-06-28 03:13:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825526544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:50,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:50,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742693169] [2024-06-28 03:13:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:50,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:50,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:50,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:50,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:50,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:50,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:50,690 INFO L124 PetriNetUnfolderBase]: 2131/3151 cut-off events. [2024-06-28 03:13:50,690 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-28 03:13:50,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15155 conditions, 3151 events. 2131/3151 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14366 event pairs, 694 based on Foata normal form. 6/3156 useless extension candidates. Maximal degree in co-relation 15117. Up to 3076 conditions per place. [2024-06-28 03:13:50,713 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-28 03:13:50,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1170 flow [2024-06-28 03:13:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:13:50,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-28 03:13:50,715 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 768 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:13:50,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1170 flow [2024-06-28 03:13:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 1121 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:50,745 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 846 flow [2024-06-28 03:13:50,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-28 03:13:50,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-28 03:13:50,746 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 846 flow [2024-06-28 03:13:50,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-28 03:13:50,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:50,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:13:50,747 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)] === [2024-06-28 03:13:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 115259863, now seen corresponding path program 1 times [2024-06-28 03:13:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:50,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877185010] [2024-06-28 03:13:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:50,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877185010] [2024-06-28 03:13:51,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877185010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:51,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:51,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:13:51,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971110708] [2024-06-28 03:13:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:51,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:13:51,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:13:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:13:51,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:51,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-28 03:13:51,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:51,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:51,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:52,511 INFO L124 PetriNetUnfolderBase]: 2134/3156 cut-off events. [2024-06-28 03:13:52,512 INFO L125 PetriNetUnfolderBase]: For 30079/30079 co-relation queries the response was YES. [2024-06-28 03:13:52,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15526 conditions, 3156 events. 2134/3156 cut-off events. For 30079/30079 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14430 event pairs, 673 based on Foata normal form. 6/3161 useless extension candidates. Maximal degree in co-relation 15486. Up to 3061 conditions per place. [2024-06-28 03:13:52,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-28 03:13:52,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1228 flow [2024-06-28 03:13:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:13:52,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:13:52,543 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 846 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:13:52,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1228 flow [2024-06-28 03:13:52,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 1175 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:52,578 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 889 flow [2024-06-28 03:13:52,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-28 03:13:52,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 03:13:52,579 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 889 flow [2024-06-28 03:13:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-28 03:13:52,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:52,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:52,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:13:52,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:52,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -842309822, now seen corresponding path program 1 times [2024-06-28 03:13:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:52,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469386112] [2024-06-28 03:13:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469386112] [2024-06-28 03:13:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469386112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:53,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:53,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:13:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250898032] [2024-06-28 03:13:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:13:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:13:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:13:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:53,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 889 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:53,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:53,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:53,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:53,770 INFO L124 PetriNetUnfolderBase]: 2131/3152 cut-off events. [2024-06-28 03:13:53,770 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-28 03:13:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15971 conditions, 3152 events. 2131/3152 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14345 event pairs, 697 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 15930. Up to 3137 conditions per place. [2024-06-28 03:13:53,794 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 102 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-28 03:13:53,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1129 flow [2024-06-28 03:13:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:13:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:13:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-28 03:13:53,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-28 03:13:53,796 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 889 flow. Second operand 5 states and 83 transitions. [2024-06-28 03:13:53,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1129 flow [2024-06-28 03:13:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 1049 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:53,828 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 831 flow [2024-06-28 03:13:53,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=831, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-28 03:13:53,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 03:13:53,829 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 831 flow [2024-06-28 03:13:53,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:53,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:53,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:13:53,830 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)] === [2024-06-28 03:13:53,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 663410780, now seen corresponding path program 1 times [2024-06-28 03:13:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629993544] [2024-06-28 03:13:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:53,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:54,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629993544] [2024-06-28 03:13:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629993544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828176411] [2024-06-28 03:13:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:54,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:54,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:54,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:54,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 831 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) [2024-06-28 03:13:54,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:54,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:54,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:55,499 INFO L124 PetriNetUnfolderBase]: 2008/3035 cut-off events. [2024-06-28 03:13:55,499 INFO L125 PetriNetUnfolderBase]: For 35200/35236 co-relation queries the response was YES. [2024-06-28 03:13:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15402 conditions, 3035 events. 2008/3035 cut-off events. For 35200/35236 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14309 event pairs, 612 based on Foata normal form. 14/3028 useless extension candidates. Maximal degree in co-relation 15360. Up to 2758 conditions per place. [2024-06-28 03:13:55,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-28 03:13:55,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1277 flow [2024-06-28 03:13:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 03:13:55,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-28 03:13:55,524 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 831 flow. Second operand 7 states and 135 transitions. [2024-06-28 03:13:55,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1277 flow [2024-06-28 03:13:55,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1253 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:55,563 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 953 flow [2024-06-28 03:13:55,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-28 03:13:55,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-28 03:13:55,565 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 953 flow [2024-06-28 03:13:55,566 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) [2024-06-28 03:13:55,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:55,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:55,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:13:55,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 663500990, now seen corresponding path program 2 times [2024-06-28 03:13:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:55,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763720640] [2024-06-28 03:13:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:55,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763720640] [2024-06-28 03:13:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763720640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:56,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529091533] [2024-06-28 03:13:56,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:56,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:56,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:56,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 953 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) [2024-06-28 03:13:56,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:56,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:56,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:57,468 INFO L124 PetriNetUnfolderBase]: 2003/3028 cut-off events. [2024-06-28 03:13:57,469 INFO L125 PetriNetUnfolderBase]: For 39866/39902 co-relation queries the response was YES. [2024-06-28 03:13:57,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15997 conditions, 3028 events. 2003/3028 cut-off events. For 39866/39902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14288 event pairs, 612 based on Foata normal form. 14/3021 useless extension candidates. Maximal degree in co-relation 15955. Up to 2786 conditions per place. [2024-06-28 03:13:57,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-28 03:13:57,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1243 flow [2024-06-28 03:13:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:13:57,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-28 03:13:57,492 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 953 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:13:57,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1243 flow [2024-06-28 03:13:57,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1162 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:57,544 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 924 flow [2024-06-28 03:13:57,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=924, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-28 03:13:57,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-28 03:13:57,545 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 924 flow [2024-06-28 03:13:57,546 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) [2024-06-28 03:13:57,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:57,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:13:57,548 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:57,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash 667225795, now seen corresponding path program 1 times [2024-06-28 03:13:57,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:57,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767623762] [2024-06-28 03:13:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:57,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:58,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:58,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767623762] [2024-06-28 03:13:58,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767623762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:58,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:58,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:58,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981023017] [2024-06-28 03:13:58,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:58,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:58,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:58,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:58,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 924 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:58,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:58,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:58,942 INFO L124 PetriNetUnfolderBase]: 2221/3283 cut-off events. [2024-06-28 03:13:58,942 INFO L125 PetriNetUnfolderBase]: For 46889/46891 co-relation queries the response was YES. [2024-06-28 03:13:58,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17710 conditions, 3283 events. 2221/3283 cut-off events. For 46889/46891 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15075 event pairs, 639 based on Foata normal form. 8/3290 useless extension candidates. Maximal degree in co-relation 17666. Up to 2821 conditions per place. [2024-06-28 03:13:58,969 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-28 03:13:58,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 152 transitions, 1598 flow [2024-06-28 03:13:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:13:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:13:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 03:13:58,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-28 03:13:58,971 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 924 flow. Second operand 7 states and 138 transitions. [2024-06-28 03:13:58,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 152 transitions, 1598 flow [2024-06-28 03:13:59,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1543 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:13:59,024 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1131 flow [2024-06-28 03:13:59,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-28 03:13:59,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-28 03:13:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1131 flow [2024-06-28 03:13:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:59,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:59,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:13:59,026 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:59,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1925654069, now seen corresponding path program 2 times [2024-06-28 03:13:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13459780] [2024-06-28 03:13:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:59,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13459780] [2024-06-28 03:13:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13459780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:59,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:59,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:13:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554764132] [2024-06-28 03:13:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:59,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:13:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:13:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:13:59,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:59,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:59,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:59,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:59,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:00,434 INFO L124 PetriNetUnfolderBase]: 2209/3267 cut-off events. [2024-06-28 03:14:00,434 INFO L125 PetriNetUnfolderBase]: For 53103/53105 co-relation queries the response was YES. [2024-06-28 03:14:00,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18644 conditions, 3267 events. 2209/3267 cut-off events. For 53103/53105 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14984 event pairs, 636 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18597. Up to 2815 conditions per place. [2024-06-28 03:14:00,505 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 103 selfloop transitions, 50 changer transitions 0/156 dead transitions. [2024-06-28 03:14:00,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1721 flow [2024-06-28 03:14:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 03:14:00,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-28 03:14:00,507 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1131 flow. Second operand 7 states and 141 transitions. [2024-06-28 03:14:00,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1721 flow [2024-06-28 03:14:00,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 156 transitions, 1626 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:00,587 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 1239 flow [2024-06-28 03:14:00,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1239, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2024-06-28 03:14:00,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-28 03:14:00,588 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 1239 flow [2024-06-28 03:14:00,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:00,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:00,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:14:00,589 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:00,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -520336043, now seen corresponding path program 3 times [2024-06-28 03:14:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134392715] [2024-06-28 03:14:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134392715] [2024-06-28 03:14:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134392715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:01,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364049774] [2024-06-28 03:14:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:01,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:01,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 1239 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:01,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:01,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:01,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:01,970 INFO L124 PetriNetUnfolderBase]: 2213/3272 cut-off events. [2024-06-28 03:14:01,971 INFO L125 PetriNetUnfolderBase]: For 57921/57927 co-relation queries the response was YES. [2024-06-28 03:14:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 3272 events. 2213/3272 cut-off events. For 57921/57927 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14971 event pairs, 680 based on Foata normal form. 12/3283 useless extension candidates. Maximal degree in co-relation 19204. Up to 3164 conditions per place. [2024-06-28 03:14:01,990 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-06-28 03:14:01,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 149 transitions, 1689 flow [2024-06-28 03:14:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:14:01,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:14:01,992 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 1239 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:14:01,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 149 transitions, 1689 flow [2024-06-28 03:14:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 149 transitions, 1589 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:02,048 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1266 flow [2024-06-28 03:14:02,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1266, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-28 03:14:02,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-28 03:14:02,050 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1266 flow [2024-06-28 03:14:02,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:02,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:02,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:14:02,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:02,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 946214084, now seen corresponding path program 1 times [2024-06-28 03:14:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103046066] [2024-06-28 03:14:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103046066] [2024-06-28 03:14:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103046066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:03,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:03,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534842068] [2024-06-28 03:14:03,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:03,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:03,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1266 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-28 03:14:03,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:03,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:03,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:03,709 INFO L124 PetriNetUnfolderBase]: 2215/3274 cut-off events. [2024-06-28 03:14:03,709 INFO L125 PetriNetUnfolderBase]: For 61158/61158 co-relation queries the response was YES. [2024-06-28 03:14:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 3274 events. 2215/3274 cut-off events. For 61158/61158 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14993 event pairs, 667 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 19137. Up to 3168 conditions per place. [2024-06-28 03:14:03,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-28 03:14:03,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1712 flow [2024-06-28 03:14:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:14:03,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:14:03,732 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1266 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:14:03,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1712 flow [2024-06-28 03:14:03,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 152 transitions, 1643 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:03,799 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1335 flow [2024-06-28 03:14:03,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-28 03:14:03,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-28 03:14:03,800 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1335 flow [2024-06-28 03:14:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-28 03:14:03,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:03,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:03,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:14:03,800 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)] === [2024-06-28 03:14:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash -341799338, now seen corresponding path program 1 times [2024-06-28 03:14:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272346333] [2024-06-28 03:14:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:03,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272346333] [2024-06-28 03:14:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272346333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:04,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765788921] [2024-06-28 03:14:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:04,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:04,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1335 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:04,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:04,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:04,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:05,037 INFO L124 PetriNetUnfolderBase]: 2206/3262 cut-off events. [2024-06-28 03:14:05,037 INFO L125 PetriNetUnfolderBase]: For 65551/65551 co-relation queries the response was YES. [2024-06-28 03:14:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19732 conditions, 3262 events. 2206/3262 cut-off events. For 65551/65551 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14831 event pairs, 674 based on Foata normal form. 3/3264 useless extension candidates. Maximal degree in co-relation 19681. Up to 3238 conditions per place. [2024-06-28 03:14:05,060 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2024-06-28 03:14:05,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1671 flow [2024-06-28 03:14:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:14:05,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 03:14:05,062 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1335 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:14:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1671 flow [2024-06-28 03:14:05,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1583 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:05,118 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1307 flow [2024-06-28 03:14:05,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-28 03:14:05,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-28 03:14:05,119 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1307 flow [2024-06-28 03:14:05,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:05,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:05,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:14:05,120 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:05,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 316114428, now seen corresponding path program 1 times [2024-06-28 03:14:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:05,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48474983] [2024-06-28 03:14:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:06,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48474983] [2024-06-28 03:14:06,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48474983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:06,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:06,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193196272] [2024-06-28 03:14:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:06,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:06,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1307 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) [2024-06-28 03:14:06,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:06,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:06,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:06,917 INFO L124 PetriNetUnfolderBase]: 2088/3153 cut-off events. [2024-06-28 03:14:06,917 INFO L125 PetriNetUnfolderBase]: For 68736/68787 co-relation queries the response was YES. [2024-06-28 03:14:06,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19410 conditions, 3153 events. 2088/3153 cut-off events. For 68736/68787 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14988 event pairs, 452 based on Foata normal form. 15/3148 useless extension candidates. Maximal degree in co-relation 19358. Up to 2758 conditions per place. [2024-06-28 03:14:06,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 32 changer transitions 0/171 dead transitions. [2024-06-28 03:14:06,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1865 flow [2024-06-28 03:14:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:14:06,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:14:06,939 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1307 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:14:06,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1865 flow [2024-06-28 03:14:06,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 171 transitions, 1827 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:06,988 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1440 flow [2024-06-28 03:14:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-28 03:14:06,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-28 03:14:06,989 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1440 flow [2024-06-28 03:14:06,989 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) [2024-06-28 03:14:06,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:06,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:14:06,990 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)] === [2024-06-28 03:14:06,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash 316175002, now seen corresponding path program 1 times [2024-06-28 03:14:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:06,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666868506] [2024-06-28 03:14:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:07,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:07,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666868506] [2024-06-28 03:14:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666868506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:07,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431548332] [2024-06-28 03:14:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:07,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:08,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:08,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:08,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:08,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:08,641 INFO L124 PetriNetUnfolderBase]: 2283/3376 cut-off events. [2024-06-28 03:14:08,641 INFO L125 PetriNetUnfolderBase]: For 79253/79255 co-relation queries the response was YES. [2024-06-28 03:14:08,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21295 conditions, 3376 events. 2283/3376 cut-off events. For 79253/79255 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15668 event pairs, 521 based on Foata normal form. 6/3381 useless extension candidates. Maximal degree in co-relation 21242. Up to 2629 conditions per place. [2024-06-28 03:14:08,665 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 65 changer transitions 0/196 dead transitions. [2024-06-28 03:14:08,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 196 transitions, 2450 flow [2024-06-28 03:14:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 03:14:08,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-28 03:14:08,667 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1440 flow. Second operand 8 states and 162 transitions. [2024-06-28 03:14:08,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 196 transitions, 2450 flow [2024-06-28 03:14:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 2360 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:08,747 INFO L231 Difference]: Finished difference. Result has 121 places, 153 transitions, 1734 flow [2024-06-28 03:14:08,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1734, PETRI_PLACES=121, PETRI_TRANSITIONS=153} [2024-06-28 03:14:08,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-28 03:14:08,748 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 153 transitions, 1734 flow [2024-06-28 03:14:08,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:08,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:08,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:08,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:14:08,748 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)] === [2024-06-28 03:14:08,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash 316174878, now seen corresponding path program 2 times [2024-06-28 03:14:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:08,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2829089] [2024-06-28 03:14:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:08,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2829089] [2024-06-28 03:14:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2829089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:09,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:09,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703687857] [2024-06-28 03:14:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:09,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:09,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 153 transitions, 1734 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) [2024-06-28 03:14:09,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:09,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:09,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:10,537 INFO L124 PetriNetUnfolderBase]: 2161/3247 cut-off events. [2024-06-28 03:14:10,537 INFO L125 PetriNetUnfolderBase]: For 85605/85657 co-relation queries the response was YES. [2024-06-28 03:14:10,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21856 conditions, 3247 events. 2161/3247 cut-off events. For 85605/85657 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15422 event pairs, 561 based on Foata normal form. 16/3243 useless extension candidates. Maximal degree in co-relation 21798. Up to 2917 conditions per place. [2024-06-28 03:14:10,564 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 131 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-06-28 03:14:10,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 187 transitions, 2144 flow [2024-06-28 03:14:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:14:10,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-28 03:14:10,565 INFO L175 Difference]: Start difference. First operand has 121 places, 153 transitions, 1734 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:14:10,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 187 transitions, 2144 flow [2024-06-28 03:14:10,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 2021 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-28 03:14:10,663 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1681 flow [2024-06-28 03:14:10,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1681, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-28 03:14:10,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-28 03:14:10,664 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1681 flow [2024-06-28 03:14:10,665 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) [2024-06-28 03:14:10,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:10,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:14:10,665 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)] === [2024-06-28 03:14:10,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash 318976162, now seen corresponding path program 2 times [2024-06-28 03:14:10,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327312530] [2024-06-28 03:14:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:11,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:11,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327312530] [2024-06-28 03:14:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327312530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:11,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720742789] [2024-06-28 03:14:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:11,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:11,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:11,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1681 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:11,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:11,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:12,460 INFO L124 PetriNetUnfolderBase]: 2311/3416 cut-off events. [2024-06-28 03:14:12,460 INFO L125 PetriNetUnfolderBase]: For 93923/93925 co-relation queries the response was YES. [2024-06-28 03:14:12,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23149 conditions, 3416 events. 2311/3416 cut-off events. For 93923/93925 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15825 event pairs, 548 based on Foata normal form. 6/3421 useless extension candidates. Maximal degree in co-relation 23089. Up to 2871 conditions per place. [2024-06-28 03:14:12,480 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 128 selfloop transitions, 62 changer transitions 0/193 dead transitions. [2024-06-28 03:14:12,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2450 flow [2024-06-28 03:14:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:14:12,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-28 03:14:12,482 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1681 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:14:12,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2450 flow [2024-06-28 03:14:12,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 193 transitions, 2380 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:12,560 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1813 flow [2024-06-28 03:14:12,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1813, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-28 03:14:12,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-28 03:14:12,560 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1813 flow [2024-06-28 03:14:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:12,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:12,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:14:12,561 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)] === [2024-06-28 03:14:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 318971512, now seen corresponding path program 3 times [2024-06-28 03:14:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520809173] [2024-06-28 03:14:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:13,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:13,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520809173] [2024-06-28 03:14:13,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520809173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:13,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:13,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:13,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607258153] [2024-06-28 03:14:13,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:13,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:13,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:13,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:13,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1813 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:13,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:13,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:13,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:14,255 INFO L124 PetriNetUnfolderBase]: 2371/3501 cut-off events. [2024-06-28 03:14:14,255 INFO L125 PetriNetUnfolderBase]: For 103141/103143 co-relation queries the response was YES. [2024-06-28 03:14:14,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24431 conditions, 3501 events. 2371/3501 cut-off events. For 103141/103143 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16296 event pairs, 552 based on Foata normal form. 8/3508 useless extension candidates. Maximal degree in co-relation 24370. Up to 2955 conditions per place. [2024-06-28 03:14:14,281 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 138 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-28 03:14:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 204 transitions, 2639 flow [2024-06-28 03:14:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:14:14,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-28 03:14:14,283 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1813 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:14:14,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 204 transitions, 2639 flow [2024-06-28 03:14:14,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 204 transitions, 2476 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:14,375 INFO L231 Difference]: Finished difference. Result has 132 places, 165 transitions, 1931 flow [2024-06-28 03:14:14,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1931, PETRI_PLACES=132, PETRI_TRANSITIONS=165} [2024-06-28 03:14:14,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-28 03:14:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 165 transitions, 1931 flow [2024-06-28 03:14:14,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:14,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:14,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:14:14,376 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)] === [2024-06-28 03:14:14,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash 434262682, now seen corresponding path program 4 times [2024-06-28 03:14:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559754269] [2024-06-28 03:14:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:15,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559754269] [2024-06-28 03:14:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559754269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:15,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:15,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290670091] [2024-06-28 03:14:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:15,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:15,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:15,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 165 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:15,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:15,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:15,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:16,080 INFO L124 PetriNetUnfolderBase]: 2431/3587 cut-off events. [2024-06-28 03:14:16,080 INFO L125 PetriNetUnfolderBase]: For 113170/113172 co-relation queries the response was YES. [2024-06-28 03:14:16,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25625 conditions, 3587 events. 2431/3587 cut-off events. For 113170/113172 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16783 event pairs, 524 based on Foata normal form. 8/3594 useless extension candidates. Maximal degree in co-relation 25562. Up to 2984 conditions per place. [2024-06-28 03:14:16,107 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 152 selfloop transitions, 65 changer transitions 0/220 dead transitions. [2024-06-28 03:14:16,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 220 transitions, 2919 flow [2024-06-28 03:14:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:14:16,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-28 03:14:16,108 INFO L175 Difference]: Start difference. First operand has 132 places, 165 transitions, 1931 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:14:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 220 transitions, 2919 flow [2024-06-28 03:14:16,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 220 transitions, 2800 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:16,235 INFO L231 Difference]: Finished difference. Result has 137 places, 173 transitions, 2112 flow [2024-06-28 03:14:16,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=137, PETRI_TRANSITIONS=173} [2024-06-28 03:14:16,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-28 03:14:16,236 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 173 transitions, 2112 flow [2024-06-28 03:14:16,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:16,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:16,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:16,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:14:16,236 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)] === [2024-06-28 03:14:16,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash -790828564, now seen corresponding path program 1 times [2024-06-28 03:14:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:16,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984473081] [2024-06-28 03:14:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:17,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984473081] [2024-06-28 03:14:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984473081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:17,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:17,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580644777] [2024-06-28 03:14:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:17,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:17,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:17,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:17,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 173 transitions, 2112 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:17,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:17,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:17,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:18,166 INFO L124 PetriNetUnfolderBase]: 2487/3675 cut-off events. [2024-06-28 03:14:18,166 INFO L125 PetriNetUnfolderBase]: For 126011/126013 co-relation queries the response was YES. [2024-06-28 03:14:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27013 conditions, 3675 events. 2487/3675 cut-off events. For 126011/126013 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17313 event pairs, 549 based on Foata normal form. 14/3688 useless extension candidates. Maximal degree in co-relation 26947. Up to 3174 conditions per place. [2024-06-28 03:14:18,191 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 154 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-28 03:14:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 210 transitions, 2850 flow [2024-06-28 03:14:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:14:18,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-28 03:14:18,192 INFO L175 Difference]: Start difference. First operand has 137 places, 173 transitions, 2112 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:14:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 210 transitions, 2850 flow [2024-06-28 03:14:18,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 2701 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:18,307 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 2162 flow [2024-06-28 03:14:18,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2162, PETRI_PLACES=140, PETRI_TRANSITIONS=177} [2024-06-28 03:14:18,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 03:14:18,308 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 2162 flow [2024-06-28 03:14:18,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:18,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:18,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:18,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:14:18,309 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)] === [2024-06-28 03:14:18,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash -790835508, now seen corresponding path program 5 times [2024-06-28 03:14:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:18,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291032496] [2024-06-28 03:14:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:18,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:19,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291032496] [2024-06-28 03:14:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291032496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:19,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:19,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566530050] [2024-06-28 03:14:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:19,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 177 transitions, 2162 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:19,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:19,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:20,174 INFO L124 PetriNetUnfolderBase]: 2523/3727 cut-off events. [2024-06-28 03:14:20,175 INFO L125 PetriNetUnfolderBase]: For 131962/131964 co-relation queries the response was YES. [2024-06-28 03:14:20,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28110 conditions, 3727 events. 2523/3727 cut-off events. For 131962/131964 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17578 event pairs, 523 based on Foata normal form. 8/3734 useless extension candidates. Maximal degree in co-relation 28042. Up to 3244 conditions per place. [2024-06-28 03:14:20,205 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 155 selfloop transitions, 55 changer transitions 0/213 dead transitions. [2024-06-28 03:14:20,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 213 transitions, 2864 flow [2024-06-28 03:14:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:14:20,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:14:20,207 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 2162 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:14:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 213 transitions, 2864 flow [2024-06-28 03:14:20,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2695 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:20,339 INFO L231 Difference]: Finished difference. Result has 142 places, 181 transitions, 2204 flow [2024-06-28 03:14:20,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=142, PETRI_TRANSITIONS=181} [2024-06-28 03:14:20,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-28 03:14:20,341 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 181 transitions, 2204 flow [2024-06-28 03:14:20,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:20,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:20,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:20,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:14:20,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:20,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 904019071, now seen corresponding path program 1 times [2024-06-28 03:14:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:20,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120722397] [2024-06-28 03:14:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:20,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:20,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:20,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120722397] [2024-06-28 03:14:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120722397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:20,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251757816] [2024-06-28 03:14:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:20,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:20,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:20,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 181 transitions, 2204 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:20,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:20,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:20,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:21,522 INFO L124 PetriNetUnfolderBase]: 2528/3732 cut-off events. [2024-06-28 03:14:21,522 INFO L125 PetriNetUnfolderBase]: For 138247/138247 co-relation queries the response was YES. [2024-06-28 03:14:21,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28220 conditions, 3732 events. 2528/3732 cut-off events. For 138247/138247 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17552 event pairs, 637 based on Foata normal form. 1/3732 useless extension candidates. Maximal degree in co-relation 28151. Up to 3695 conditions per place. [2024-06-28 03:14:21,552 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 181 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-28 03:14:21,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 2749 flow [2024-06-28 03:14:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 03:14:21,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 03:14:21,557 INFO L175 Difference]: Start difference. First operand has 142 places, 181 transitions, 2204 flow. Second operand 6 states and 104 transitions. [2024-06-28 03:14:21,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 2749 flow [2024-06-28 03:14:21,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 200 transitions, 2584 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:21,680 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 2130 flow [2024-06-28 03:14:21,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2130, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-28 03:14:21,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-28 03:14:21,680 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 2130 flow [2024-06-28 03:14:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:21,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:21,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:14:21,681 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)] === [2024-06-28 03:14:21,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -49655982, now seen corresponding path program 2 times [2024-06-28 03:14:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892823263] [2024-06-28 03:14:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892823263] [2024-06-28 03:14:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892823263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:22,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954128196] [2024-06-28 03:14:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:22,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:22,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:22,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:22,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:22,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:22,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:22,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:23,483 INFO L124 PetriNetUnfolderBase]: 2556/3776 cut-off events. [2024-06-28 03:14:23,483 INFO L125 PetriNetUnfolderBase]: For 146310/146310 co-relation queries the response was YES. [2024-06-28 03:14:23,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28273 conditions, 3776 events. 2556/3776 cut-off events. For 146310/146310 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17839 event pairs, 624 based on Foata normal form. 6/3781 useless extension candidates. Maximal degree in co-relation 28203. Up to 3617 conditions per place. [2024-06-28 03:14:23,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2024-06-28 03:14:23,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2822 flow [2024-06-28 03:14:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:14:23,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 03:14:23,516 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 2130 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:14:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2822 flow [2024-06-28 03:14:23,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 215 transitions, 2679 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:23,655 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 2137 flow [2024-06-28 03:14:23,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-28 03:14:23,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-28 03:14:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 2137 flow [2024-06-28 03:14:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:23,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:14:23,656 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)] === [2024-06-28 03:14:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 178245168, now seen corresponding path program 3 times [2024-06-28 03:14:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675898550] [2024-06-28 03:14:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:24,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:24,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675898550] [2024-06-28 03:14:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675898550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:24,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461382882] [2024-06-28 03:14:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:24,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:24,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 2137 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:24,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:24,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:24,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:25,445 INFO L124 PetriNetUnfolderBase]: 2584/3820 cut-off events. [2024-06-28 03:14:25,446 INFO L125 PetriNetUnfolderBase]: For 155705/155705 co-relation queries the response was YES. [2024-06-28 03:14:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29040 conditions, 3820 events. 2584/3820 cut-off events. For 155705/155705 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18151 event pairs, 627 based on Foata normal form. 6/3825 useless extension candidates. Maximal degree in co-relation 28970. Up to 3721 conditions per place. [2024-06-28 03:14:25,479 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 24 changer transitions 0/216 dead transitions. [2024-06-28 03:14:25,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 2773 flow [2024-06-28 03:14:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:14:25,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:14:25,480 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 2137 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:14:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 2773 flow [2024-06-28 03:14:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2647 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:25,623 INFO L231 Difference]: Finished difference. Result has 146 places, 190 transitions, 2155 flow [2024-06-28 03:14:25,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2155, PETRI_PLACES=146, PETRI_TRANSITIONS=190} [2024-06-28 03:14:25,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-28 03:14:25,624 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 190 transitions, 2155 flow [2024-06-28 03:14:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:25,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:25,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:25,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:14:25,625 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)] === [2024-06-28 03:14:25,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash 186519378, now seen corresponding path program 4 times [2024-06-28 03:14:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:25,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931074652] [2024-06-28 03:14:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:26,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931074652] [2024-06-28 03:14:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931074652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:26,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:26,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047048852] [2024-06-28 03:14:26,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:26,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:26,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:26,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:26,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 190 transitions, 2155 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:26,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:26,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:26,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:27,417 INFO L124 PetriNetUnfolderBase]: 2612/3864 cut-off events. [2024-06-28 03:14:27,417 INFO L125 PetriNetUnfolderBase]: For 165610/165610 co-relation queries the response was YES. [2024-06-28 03:14:27,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29655 conditions, 3864 events. 2612/3864 cut-off events. For 165610/165610 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18373 event pairs, 629 based on Foata normal form. 6/3869 useless extension candidates. Maximal degree in co-relation 29584. Up to 3706 conditions per place. [2024-06-28 03:14:27,449 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-28 03:14:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 219 transitions, 2805 flow [2024-06-28 03:14:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:14:27,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:14:27,450 INFO L175 Difference]: Start difference. First operand has 146 places, 190 transitions, 2155 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:14:27,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 219 transitions, 2805 flow [2024-06-28 03:14:27,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 219 transitions, 2685 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:27,589 INFO L231 Difference]: Finished difference. Result has 148 places, 193 transitions, 2213 flow [2024-06-28 03:14:27,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2213, PETRI_PLACES=148, PETRI_TRANSITIONS=193} [2024-06-28 03:14:27,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 03:14:27,590 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 193 transitions, 2213 flow [2024-06-28 03:14:27,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:27,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:27,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:27,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:14:27,591 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)] === [2024-06-28 03:14:27,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 186519130, now seen corresponding path program 1 times [2024-06-28 03:14:27,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:27,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007259461] [2024-06-28 03:14:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:27,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:28,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007259461] [2024-06-28 03:14:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007259461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:28,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658844098] [2024-06-28 03:14:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:28,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:28,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 193 transitions, 2213 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:28,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:28,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:29,187 INFO L124 PetriNetUnfolderBase]: 2614/3868 cut-off events. [2024-06-28 03:14:29,188 INFO L125 PetriNetUnfolderBase]: For 171789/171795 co-relation queries the response was YES. [2024-06-28 03:14:29,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29952 conditions, 3868 events. 2614/3868 cut-off events. For 171789/171795 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18432 event pairs, 627 based on Foata normal form. 9/3876 useless extension candidates. Maximal degree in co-relation 29880. Up to 3714 conditions per place. [2024-06-28 03:14:29,222 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-28 03:14:29,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2851 flow [2024-06-28 03:14:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:14:29,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-28 03:14:29,223 INFO L175 Difference]: Start difference. First operand has 148 places, 193 transitions, 2213 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:14:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2851 flow [2024-06-28 03:14:29,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 2697 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:29,399 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 2237 flow [2024-06-28 03:14:29,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2237, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-06-28 03:14:29,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-28 03:14:29,399 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 2237 flow [2024-06-28 03:14:29,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:29,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:29,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:14:29,400 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)] === [2024-06-28 03:14:29,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash -732370508, now seen corresponding path program 6 times [2024-06-28 03:14:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:29,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066102338] [2024-06-28 03:14:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:30,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:30,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066102338] [2024-06-28 03:14:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066102338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:30,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:30,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110608526] [2024-06-28 03:14:30,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:30,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:30,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 2237 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:30,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:30,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:30,976 INFO L124 PetriNetUnfolderBase]: 2620/3877 cut-off events. [2024-06-28 03:14:30,976 INFO L125 PetriNetUnfolderBase]: For 168851/168857 co-relation queries the response was YES. [2024-06-28 03:14:31,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29458 conditions, 3877 events. 2620/3877 cut-off events. For 168851/168857 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18455 event pairs, 624 based on Foata normal form. 15/3891 useless extension candidates. Maximal degree in co-relation 29385. Up to 3676 conditions per place. [2024-06-28 03:14:31,023 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-28 03:14:31,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2972 flow [2024-06-28 03:14:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:14:31,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 03:14:31,025 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 2237 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:14:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2972 flow [2024-06-28 03:14:31,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 231 transitions, 2856 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:31,205 INFO L231 Difference]: Finished difference. Result has 152 places, 204 transitions, 2375 flow [2024-06-28 03:14:31,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2375, PETRI_PLACES=152, PETRI_TRANSITIONS=204} [2024-06-28 03:14:31,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-28 03:14:31,205 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 204 transitions, 2375 flow [2024-06-28 03:14:31,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-28 03:14:31,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:31,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:31,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:14:31,206 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)] === [2024-06-28 03:14:31,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:31,206 INFO L85 PathProgramCache]: Analyzing trace with hash -723792684, now seen corresponding path program 5 times [2024-06-28 03:14:31,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:31,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931147923] [2024-06-28 03:14:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:32,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931147923] [2024-06-28 03:14:32,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931147923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:32,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:32,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:32,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038710177] [2024-06-28 03:14:32,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:32,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:32,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:32,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:32,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 204 transitions, 2375 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:32,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:32,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:32,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:32,894 INFO L124 PetriNetUnfolderBase]: 2623/3881 cut-off events. [2024-06-28 03:14:32,894 INFO L125 PetriNetUnfolderBase]: For 174432/174432 co-relation queries the response was YES. [2024-06-28 03:14:32,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29751 conditions, 3881 events. 2623/3881 cut-off events. For 174432/174432 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18482 event pairs, 608 based on Foata normal form. 6/3886 useless extension candidates. Maximal degree in co-relation 29677. Up to 3754 conditions per place. [2024-06-28 03:14:32,928 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-28 03:14:32,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 233 transitions, 3059 flow [2024-06-28 03:14:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:14:32,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:14:32,930 INFO L175 Difference]: Start difference. First operand has 152 places, 204 transitions, 2375 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:14:32,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 233 transitions, 3059 flow [2024-06-28 03:14:33,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 233 transitions, 2888 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:33,105 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 2366 flow [2024-06-28 03:14:33,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2366, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-28 03:14:33,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-28 03:14:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 2366 flow [2024-06-28 03:14:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:33,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:33,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:33,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:14:33,106 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)] === [2024-06-28 03:14:33,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2005857375, now seen corresponding path program 2 times [2024-06-28 03:14:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340488780] [2024-06-28 03:14:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340488780] [2024-06-28 03:14:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340488780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:33,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:33,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:33,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405199462] [2024-06-28 03:14:33,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:33,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:33,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:33,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 2366 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:33,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:33,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:33,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:34,312 INFO L124 PetriNetUnfolderBase]: 2620/3877 cut-off events. [2024-06-28 03:14:34,312 INFO L125 PetriNetUnfolderBase]: For 179000/179000 co-relation queries the response was YES. [2024-06-28 03:14:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29749 conditions, 3877 events. 2620/3877 cut-off events. For 179000/179000 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18447 event pairs, 636 based on Foata normal form. 1/3877 useless extension candidates. Maximal degree in co-relation 29674. Up to 3859 conditions per place. [2024-06-28 03:14:34,345 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 202 selfloop transitions, 11 changer transitions 0/216 dead transitions. [2024-06-28 03:14:34,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 216 transitions, 2814 flow [2024-06-28 03:14:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-28 03:14:34,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-28 03:14:34,347 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 2366 flow. Second operand 6 states and 95 transitions. [2024-06-28 03:14:34,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 216 transitions, 2814 flow [2024-06-28 03:14:34,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2664 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:34,526 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 2244 flow [2024-06-28 03:14:34,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2244, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-28 03:14:34,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-28 03:14:34,526 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 2244 flow [2024-06-28 03:14:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:34,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:34,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:34,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:14:34,527 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)] === [2024-06-28 03:14:34,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 909738943, now seen corresponding path program 1 times [2024-06-28 03:14:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:34,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143076471] [2024-06-28 03:14:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:34,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:35,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:35,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143076471] [2024-06-28 03:14:35,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143076471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:35,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:35,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842939481] [2024-06-28 03:14:35,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:35,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:35,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 2244 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:35,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:35,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:35,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:35,773 INFO L124 PetriNetUnfolderBase]: 2619/3876 cut-off events. [2024-06-28 03:14:35,773 INFO L125 PetriNetUnfolderBase]: For 183387/183387 co-relation queries the response was YES. [2024-06-28 03:14:35,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29525 conditions, 3876 events. 2619/3876 cut-off events. For 183387/183387 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18419 event pairs, 634 based on Foata normal form. 3/3878 useless extension candidates. Maximal degree in co-relation 29449. Up to 3809 conditions per place. [2024-06-28 03:14:35,811 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 24 changer transitions 0/223 dead transitions. [2024-06-28 03:14:35,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 223 transitions, 2833 flow [2024-06-28 03:14:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 03:14:35,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:14:35,813 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 2244 flow. Second operand 6 states and 105 transitions. [2024-06-28 03:14:35,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 223 transitions, 2833 flow [2024-06-28 03:14:35,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 223 transitions, 2801 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:35,990 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2318 flow [2024-06-28 03:14:35,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2318, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-28 03:14:35,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-28 03:14:35,991 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2318 flow [2024-06-28 03:14:35,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:35,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:35,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:14:35,991 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)] === [2024-06-28 03:14:35,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2005851423, now seen corresponding path program 2 times [2024-06-28 03:14:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566989325] [2024-06-28 03:14:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566989325] [2024-06-28 03:14:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566989325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:36,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:36,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882707501] [2024-06-28 03:14:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:36,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:36,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2318 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:36,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:36,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:36,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:37,237 INFO L124 PetriNetUnfolderBase]: 2582/3821 cut-off events. [2024-06-28 03:14:37,237 INFO L125 PetriNetUnfolderBase]: For 189905/189907 co-relation queries the response was YES. [2024-06-28 03:14:37,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29418 conditions, 3821 events. 2582/3821 cut-off events. For 189905/189907 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18094 event pairs, 644 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 29341. Up to 3755 conditions per place. [2024-06-28 03:14:37,269 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 25 changer transitions 0/219 dead transitions. [2024-06-28 03:14:37,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2772 flow [2024-06-28 03:14:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-28 03:14:37,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:14:37,270 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2318 flow. Second operand 6 states and 102 transitions. [2024-06-28 03:14:37,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2772 flow [2024-06-28 03:14:37,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 219 transitions, 2712 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:37,454 INFO L231 Difference]: Finished difference. Result has 157 places, 210 transitions, 2314 flow [2024-06-28 03:14:37,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2314, PETRI_PLACES=157, PETRI_TRANSITIONS=210} [2024-06-28 03:14:37,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-28 03:14:37,454 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 210 transitions, 2314 flow [2024-06-28 03:14:37,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-28 03:14:37,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:37,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:37,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:14:37,455 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:37,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614158, now seen corresponding path program 1 times [2024-06-28 03:14:37,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:37,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173543243] [2024-06-28 03:14:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173543243] [2024-06-28 03:14:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173543243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:38,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436970580] [2024-06-28 03:14:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:38,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:38,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 210 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:38,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:38,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:38,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:39,269 INFO L124 PetriNetUnfolderBase]: 2920/4359 cut-off events. [2024-06-28 03:14:39,269 INFO L125 PetriNetUnfolderBase]: For 248049/248051 co-relation queries the response was YES. [2024-06-28 03:14:39,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34795 conditions, 4359 events. 2920/4359 cut-off events. For 248049/248051 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21687 event pairs, 438 based on Foata normal form. 26/4384 useless extension candidates. Maximal degree in co-relation 34717. Up to 2532 conditions per place. [2024-06-28 03:14:39,308 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 188 selfloop transitions, 83 changer transitions 0/274 dead transitions. [2024-06-28 03:14:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 274 transitions, 3664 flow [2024-06-28 03:14:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 03:14:39,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-28 03:14:39,309 INFO L175 Difference]: Start difference. First operand has 157 places, 210 transitions, 2314 flow. Second operand 9 states and 185 transitions. [2024-06-28 03:14:39,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 274 transitions, 3664 flow [2024-06-28 03:14:39,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 274 transitions, 3592 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:39,606 INFO L231 Difference]: Finished difference. Result has 162 places, 216 transitions, 2626 flow [2024-06-28 03:14:39,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2626, PETRI_PLACES=162, PETRI_TRANSITIONS=216} [2024-06-28 03:14:39,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-28 03:14:39,606 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 216 transitions, 2626 flow [2024-06-28 03:14:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:39,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:39,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:14:39,607 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:39,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1882643352, now seen corresponding path program 2 times [2024-06-28 03:14:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79593274] [2024-06-28 03:14:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79593274] [2024-06-28 03:14:40,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79593274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:40,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:40,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916145610] [2024-06-28 03:14:40,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:40,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:40,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 216 transitions, 2626 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:40,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:40,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:40,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:41,641 INFO L124 PetriNetUnfolderBase]: 3225/4846 cut-off events. [2024-06-28 03:14:41,641 INFO L125 PetriNetUnfolderBase]: For 296947/296949 co-relation queries the response was YES. [2024-06-28 03:14:41,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41010 conditions, 4846 events. 3225/4846 cut-off events. For 296947/296949 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25060 event pairs, 763 based on Foata normal form. 26/4871 useless extension candidates. Maximal degree in co-relation 40930. Up to 3456 conditions per place. [2024-06-28 03:14:41,687 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 187 selfloop transitions, 90 changer transitions 0/280 dead transitions. [2024-06-28 03:14:41,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 280 transitions, 4026 flow [2024-06-28 03:14:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-28 03:14:41,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-28 03:14:41,689 INFO L175 Difference]: Start difference. First operand has 162 places, 216 transitions, 2626 flow. Second operand 10 states and 203 transitions. [2024-06-28 03:14:41,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 280 transitions, 4026 flow [2024-06-28 03:14:42,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 280 transitions, 3855 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:42,106 INFO L231 Difference]: Finished difference. Result has 169 places, 221 transitions, 2824 flow [2024-06-28 03:14:42,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2824, PETRI_PLACES=169, PETRI_TRANSITIONS=221} [2024-06-28 03:14:42,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-28 03:14:42,106 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 221 transitions, 2824 flow [2024-06-28 03:14:42,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:42,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:42,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:14:42,107 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:42,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1882647072, now seen corresponding path program 3 times [2024-06-28 03:14:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904735201] [2024-06-28 03:14:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:42,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904735201] [2024-06-28 03:14:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904735201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:43,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:43,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:43,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644709478] [2024-06-28 03:14:43,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:43,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:43,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:43,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:43,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 221 transitions, 2824 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:43,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:43,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:43,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:44,260 INFO L124 PetriNetUnfolderBase]: 3238/4869 cut-off events. [2024-06-28 03:14:44,260 INFO L125 PetriNetUnfolderBase]: For 309703/309705 co-relation queries the response was YES. [2024-06-28 03:14:44,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41273 conditions, 4869 events. 3238/4869 cut-off events. For 309703/309705 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25219 event pairs, 761 based on Foata normal form. 32/4900 useless extension candidates. Maximal degree in co-relation 41190. Up to 3809 conditions per place. [2024-06-28 03:14:44,301 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 180 selfloop transitions, 97 changer transitions 0/280 dead transitions. [2024-06-28 03:14:44,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 280 transitions, 3950 flow [2024-06-28 03:14:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:14:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:14:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-28 03:14:44,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811529933481153 [2024-06-28 03:14:44,302 INFO L175 Difference]: Start difference. First operand has 169 places, 221 transitions, 2824 flow. Second operand 11 states and 217 transitions. [2024-06-28 03:14:44,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 280 transitions, 3950 flow [2024-06-28 03:14:44,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 280 transitions, 3759 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:44,661 INFO L231 Difference]: Finished difference. Result has 174 places, 223 transitions, 2933 flow [2024-06-28 03:14:44,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2933, PETRI_PLACES=174, PETRI_TRANSITIONS=223} [2024-06-28 03:14:44,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-28 03:14:44,662 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 223 transitions, 2933 flow [2024-06-28 03:14:44,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:44,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:44,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:14:44,663 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)] === [2024-06-28 03:14:44,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2040477405, now seen corresponding path program 1 times [2024-06-28 03:14:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:44,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12477140] [2024-06-28 03:14:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12477140] [2024-06-28 03:14:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12477140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:45,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:45,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000709847] [2024-06-28 03:14:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:45,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:45,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:45,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:45,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 223 transitions, 2933 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:45,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:45,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:45,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:46,200 INFO L124 PetriNetUnfolderBase]: 3258/4897 cut-off events. [2024-06-28 03:14:46,200 INFO L125 PetriNetUnfolderBase]: For 290345/290347 co-relation queries the response was YES. [2024-06-28 03:14:46,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42015 conditions, 4897 events. 3258/4897 cut-off events. For 290345/290347 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25311 event pairs, 823 based on Foata normal form. 6/4902 useless extension candidates. Maximal degree in co-relation 41930. Up to 4441 conditions per place. [2024-06-28 03:14:46,243 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 63 changer transitions 0/255 dead transitions. [2024-06-28 03:14:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 255 transitions, 3766 flow [2024-06-28 03:14:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 03:14:46,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-28 03:14:46,244 INFO L175 Difference]: Start difference. First operand has 174 places, 223 transitions, 2933 flow. Second operand 7 states and 136 transitions. [2024-06-28 03:14:46,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 255 transitions, 3766 flow [2024-06-28 03:14:46,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 255 transitions, 3518 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 03:14:46,669 INFO L231 Difference]: Finished difference. Result has 172 places, 228 transitions, 2917 flow [2024-06-28 03:14:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2917, PETRI_PLACES=172, PETRI_TRANSITIONS=228} [2024-06-28 03:14:46,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-28 03:14:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 228 transitions, 2917 flow [2024-06-28 03:14:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:46,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:46,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:14:46,670 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:46,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 199448532, now seen corresponding path program 4 times [2024-06-28 03:14:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080401568] [2024-06-28 03:14:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080401568] [2024-06-28 03:14:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080401568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311440376] [2024-06-28 03:14:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:47,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:47,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:47,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:47,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 228 transitions, 2917 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:47,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:47,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:47,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:48,723 INFO L124 PetriNetUnfolderBase]: 3486/5269 cut-off events. [2024-06-28 03:14:48,723 INFO L125 PetriNetUnfolderBase]: For 342902/342904 co-relation queries the response was YES. [2024-06-28 03:14:48,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45168 conditions, 5269 events. 3486/5269 cut-off events. For 342902/342904 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27967 event pairs, 720 based on Foata normal form. 26/5294 useless extension candidates. Maximal degree in co-relation 45082. Up to 4009 conditions per place. [2024-06-28 03:14:48,773 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 205 selfloop transitions, 80 changer transitions 0/288 dead transitions. [2024-06-28 03:14:48,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 288 transitions, 4267 flow [2024-06-28 03:14:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-28 03:14:48,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-28 03:14:48,775 INFO L175 Difference]: Start difference. First operand has 172 places, 228 transitions, 2917 flow. Second operand 9 states and 187 transitions. [2024-06-28 03:14:48,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 288 transitions, 4267 flow [2024-06-28 03:14:49,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 288 transitions, 4154 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:49,231 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 3138 flow [2024-06-28 03:14:49,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3138, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-28 03:14:49,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-28 03:14:49,231 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 3138 flow [2024-06-28 03:14:49,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:49,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:49,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:14:49,232 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:49,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 577242612, now seen corresponding path program 5 times [2024-06-28 03:14:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076873588] [2024-06-28 03:14:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:50,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076873588] [2024-06-28 03:14:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076873588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:50,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:50,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:50,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164947717] [2024-06-28 03:14:50,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:50,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:50,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:50,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 3138 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:51,495 INFO L124 PetriNetUnfolderBase]: 3638/5517 cut-off events. [2024-06-28 03:14:51,495 INFO L125 PetriNetUnfolderBase]: For 385978/385980 co-relation queries the response was YES. [2024-06-28 03:14:51,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48084 conditions, 5517 events. 3638/5517 cut-off events. For 385978/385980 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29738 event pairs, 915 based on Foata normal form. 38/5554 useless extension candidates. Maximal degree in co-relation 47996. Up to 4663 conditions per place. [2024-06-28 03:14:51,547 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 204 selfloop transitions, 82 changer transitions 0/289 dead transitions. [2024-06-28 03:14:51,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 289 transitions, 4228 flow [2024-06-28 03:14:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 03:14:51,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-28 03:14:51,549 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 3138 flow. Second operand 10 states and 199 transitions. [2024-06-28 03:14:51,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 289 transitions, 4228 flow [2024-06-28 03:14:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 289 transitions, 4039 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:52,056 INFO L231 Difference]: Finished difference. Result has 183 places, 234 transitions, 3218 flow [2024-06-28 03:14:52,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2951, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3218, PETRI_PLACES=183, PETRI_TRANSITIONS=234} [2024-06-28 03:14:52,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-28 03:14:52,056 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 234 transitions, 3218 flow [2024-06-28 03:14:52,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:52,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:52,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:52,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:14:52,057 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:52,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash 582956904, now seen corresponding path program 1 times [2024-06-28 03:14:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:52,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687110554] [2024-06-28 03:14:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687110554] [2024-06-28 03:14:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687110554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:52,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924344298] [2024-06-28 03:14:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:52,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:53,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:53,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 234 transitions, 3218 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:53,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:53,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:53,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:54,128 INFO L124 PetriNetUnfolderBase]: 3666/5561 cut-off events. [2024-06-28 03:14:54,129 INFO L125 PetriNetUnfolderBase]: For 373813/373815 co-relation queries the response was YES. [2024-06-28 03:14:54,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 5561 events. 3666/5561 cut-off events. For 373813/373815 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30045 event pairs, 940 based on Foata normal form. 8/5568 useless extension candidates. Maximal degree in co-relation 48576. Up to 5079 conditions per place. [2024-06-28 03:14:54,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 204 selfloop transitions, 61 changer transitions 0/268 dead transitions. [2024-06-28 03:14:54,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 268 transitions, 4022 flow [2024-06-28 03:14:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:14:54,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 03:14:54,187 INFO L175 Difference]: Start difference. First operand has 183 places, 234 transitions, 3218 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:14:54,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 268 transitions, 4022 flow [2024-06-28 03:14:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 3803 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:54,729 INFO L231 Difference]: Finished difference. Result has 183 places, 237 transitions, 3239 flow [2024-06-28 03:14:54,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3239, PETRI_PLACES=183, PETRI_TRANSITIONS=237} [2024-06-28 03:14:54,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-28 03:14:54,730 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 237 transitions, 3239 flow [2024-06-28 03:14:54,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:54,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:54,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:14:54,730 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:54,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 582964344, now seen corresponding path program 2 times [2024-06-28 03:14:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:54,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803880493] [2024-06-28 03:14:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:55,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:55,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803880493] [2024-06-28 03:14:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803880493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:55,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:55,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140255092] [2024-06-28 03:14:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:55,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:55,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:55,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:55,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:55,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 237 transitions, 3239 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:55,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:55,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:56,864 INFO L124 PetriNetUnfolderBase]: 3694/5605 cut-off events. [2024-06-28 03:14:56,865 INFO L125 PetriNetUnfolderBase]: For 384129/384131 co-relation queries the response was YES. [2024-06-28 03:14:56,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48775 conditions, 5605 events. 3694/5605 cut-off events. For 384129/384131 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30388 event pairs, 921 based on Foata normal form. 8/5612 useless extension candidates. Maximal degree in co-relation 48684. Up to 4969 conditions per place. [2024-06-28 03:14:56,918 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 199 selfloop transitions, 72 changer transitions 0/274 dead transitions. [2024-06-28 03:14:56,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 274 transitions, 4104 flow [2024-06-28 03:14:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:14:56,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 03:14:56,920 INFO L175 Difference]: Start difference. First operand has 183 places, 237 transitions, 3239 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:14:56,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 274 transitions, 4104 flow [2024-06-28 03:14:57,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 274 transitions, 3894 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:57,403 INFO L231 Difference]: Finished difference. Result has 186 places, 243 transitions, 3362 flow [2024-06-28 03:14:57,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3362, PETRI_PLACES=186, PETRI_TRANSITIONS=243} [2024-06-28 03:14:57,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-28 03:14:57,404 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 243 transitions, 3362 flow [2024-06-28 03:14:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:57,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:57,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:14:57,404 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:57,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash 582749142, now seen corresponding path program 6 times [2024-06-28 03:14:57,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:57,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431086322] [2024-06-28 03:14:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:58,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431086322] [2024-06-28 03:14:58,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431086322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:58,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168610645] [2024-06-28 03:14:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:58,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:58,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 243 transitions, 3362 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:14:58,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:58,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:58,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:59,689 INFO L124 PetriNetUnfolderBase]: 3818/5809 cut-off events. [2024-06-28 03:14:59,690 INFO L125 PetriNetUnfolderBase]: For 435377/435379 co-relation queries the response was YES. [2024-06-28 03:14:59,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51128 conditions, 5809 events. 3818/5809 cut-off events. For 435377/435379 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31837 event pairs, 926 based on Foata normal form. 32/5840 useless extension candidates. Maximal degree in co-relation 51035. Up to 5099 conditions per place. [2024-06-28 03:14:59,753 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 216 selfloop transitions, 66 changer transitions 0/285 dead transitions. [2024-06-28 03:14:59,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 285 transitions, 4238 flow [2024-06-28 03:14:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:14:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:14:59,754 INFO L175 Difference]: Start difference. First operand has 186 places, 243 transitions, 3362 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:14:59,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 285 transitions, 4238 flow [2024-06-28 03:15:00,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 285 transitions, 4044 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:00,519 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 3415 flow [2024-06-28 03:15:00,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-06-28 03:15:00,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-28 03:15:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 3415 flow [2024-06-28 03:15:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:00,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:00,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:00,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:15:00,521 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)] === [2024-06-28 03:15:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2040178875, now seen corresponding path program 2 times [2024-06-28 03:15:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503699216] [2024-06-28 03:15:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:01,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:01,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503699216] [2024-06-28 03:15:01,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503699216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:01,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:01,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821935815] [2024-06-28 03:15:01,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:01,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:01,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 3415 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:01,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:01,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:01,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:02,175 INFO L124 PetriNetUnfolderBase]: 3884/5901 cut-off events. [2024-06-28 03:15:02,175 INFO L125 PetriNetUnfolderBase]: For 433358/433360 co-relation queries the response was YES. [2024-06-28 03:15:02,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52915 conditions, 5901 events. 3884/5901 cut-off events. For 433358/433360 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32369 event pairs, 965 based on Foata normal form. 6/5906 useless extension candidates. Maximal degree in co-relation 52820. Up to 5399 conditions per place. [2024-06-28 03:15:02,235 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 70 changer transitions 0/279 dead transitions. [2024-06-28 03:15:02,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 279 transitions, 4460 flow [2024-06-28 03:15:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:15:02,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-28 03:15:02,237 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 3415 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:15:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 279 transitions, 4460 flow [2024-06-28 03:15:02,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 279 transitions, 4241 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:02,969 INFO L231 Difference]: Finished difference. Result has 192 places, 258 transitions, 3633 flow [2024-06-28 03:15:02,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3633, PETRI_PLACES=192, PETRI_TRANSITIONS=258} [2024-06-28 03:15:02,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-28 03:15:02,970 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 258 transitions, 3633 flow [2024-06-28 03:15:02,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:02,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:02,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:15:02,970 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)] === [2024-06-28 03:15:02,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash -190001003, now seen corresponding path program 1 times [2024-06-28 03:15:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:02,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427189551] [2024-06-28 03:15:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:03,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:03,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427189551] [2024-06-28 03:15:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427189551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:03,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609570099] [2024-06-28 03:15:03,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:03,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:03,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:03,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 258 transitions, 3633 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:03,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:03,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:03,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:04,598 INFO L124 PetriNetUnfolderBase]: 3915/5942 cut-off events. [2024-06-28 03:15:04,598 INFO L125 PetriNetUnfolderBase]: For 435948/435948 co-relation queries the response was YES. [2024-06-28 03:15:04,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52927 conditions, 5942 events. 3915/5942 cut-off events. For 435948/435948 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32551 event pairs, 1062 based on Foata normal form. 3/5944 useless extension candidates. Maximal degree in co-relation 52830. Up to 5878 conditions per place. [2024-06-28 03:15:04,665 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 23 changer transitions 0/288 dead transitions. [2024-06-28 03:15:04,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 288 transitions, 4459 flow [2024-06-28 03:15:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:15:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 03:15:04,667 INFO L175 Difference]: Start difference. First operand has 192 places, 258 transitions, 3633 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:15:04,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 288 transitions, 4459 flow [2024-06-28 03:15:05,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 288 transitions, 4361 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:05,440 INFO L231 Difference]: Finished difference. Result has 197 places, 267 transitions, 3717 flow [2024-06-28 03:15:05,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3717, PETRI_PLACES=197, PETRI_TRANSITIONS=267} [2024-06-28 03:15:05,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-28 03:15:05,441 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 267 transitions, 3717 flow [2024-06-28 03:15:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:05,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:05,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:05,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:15:05,442 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:05,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:05,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2007069880, now seen corresponding path program 3 times [2024-06-28 03:15:05,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:05,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595950891] [2024-06-28 03:15:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595950891] [2024-06-28 03:15:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595950891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:06,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:06,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496316594] [2024-06-28 03:15:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:06,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:06,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 267 transitions, 3717 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:06,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:06,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:06,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:07,576 INFO L124 PetriNetUnfolderBase]: 3915/5943 cut-off events. [2024-06-28 03:15:07,576 INFO L125 PetriNetUnfolderBase]: For 450869/450875 co-relation queries the response was YES. [2024-06-28 03:15:07,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53144 conditions, 5943 events. 3915/5943 cut-off events. For 450869/450875 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32556 event pairs, 1052 based on Foata normal form. 12/5954 useless extension candidates. Maximal degree in co-relation 53045. Up to 5816 conditions per place. [2024-06-28 03:15:07,640 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 29 changer transitions 0/296 dead transitions. [2024-06-28 03:15:07,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 296 transitions, 4489 flow [2024-06-28 03:15:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:15:07,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:15:07,642 INFO L175 Difference]: Start difference. First operand has 197 places, 267 transitions, 3717 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:15:07,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 296 transitions, 4489 flow [2024-06-28 03:15:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 296 transitions, 4419 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:08,257 INFO L231 Difference]: Finished difference. Result has 202 places, 270 transitions, 3837 flow [2024-06-28 03:15:08,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3837, PETRI_PLACES=202, PETRI_TRANSITIONS=270} [2024-06-28 03:15:08,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-28 03:15:08,258 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 270 transitions, 3837 flow [2024-06-28 03:15:08,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:08,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:08,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:15:08,259 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:08,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1228432708, now seen corresponding path program 4 times [2024-06-28 03:15:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628264406] [2024-06-28 03:15:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:09,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:09,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628264406] [2024-06-28 03:15:09,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628264406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:09,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:09,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:09,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057931299] [2024-06-28 03:15:09,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:09,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:09,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:09,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 270 transitions, 3837 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:09,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:09,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:09,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:10,348 INFO L124 PetriNetUnfolderBase]: 3915/5943 cut-off events. [2024-06-28 03:15:10,348 INFO L125 PetriNetUnfolderBase]: For 464602/464608 co-relation queries the response was YES. [2024-06-28 03:15:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53433 conditions, 5943 events. 3915/5943 cut-off events. For 464602/464608 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32576 event pairs, 1052 based on Foata normal form. 12/5954 useless extension candidates. Maximal degree in co-relation 53332. Up to 5761 conditions per place. [2024-06-28 03:15:10,408 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 262 selfloop transitions, 34 changer transitions 0/299 dead transitions. [2024-06-28 03:15:10,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 299 transitions, 4614 flow [2024-06-28 03:15:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:15:10,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:15:10,409 INFO L175 Difference]: Start difference. First operand has 202 places, 270 transitions, 3837 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:15:10,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 299 transitions, 4614 flow [2024-06-28 03:15:11,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 299 transitions, 4454 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:11,162 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 3878 flow [2024-06-28 03:15:11,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3878, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-28 03:15:11,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-28 03:15:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 3878 flow [2024-06-28 03:15:11,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:11,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:11,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:15:11,163 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:11,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -971932198, now seen corresponding path program 5 times [2024-06-28 03:15:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254395342] [2024-06-28 03:15:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:12,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:12,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254395342] [2024-06-28 03:15:12,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254395342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:12,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:12,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475280759] [2024-06-28 03:15:12,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:12,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:12,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 3878 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:12,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:12,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:12,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:13,332 INFO L124 PetriNetUnfolderBase]: 3978/6040 cut-off events. [2024-06-28 03:15:13,332 INFO L125 PetriNetUnfolderBase]: For 494842/494848 co-relation queries the response was YES. [2024-06-28 03:15:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55017 conditions, 6040 events. 3978/6040 cut-off events. For 494842/494848 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33234 event pairs, 1035 based on Foata normal form. 12/6051 useless extension candidates. Maximal degree in co-relation 54915. Up to 5729 conditions per place. [2024-06-28 03:15:13,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 55 changer transitions 0/307 dead transitions. [2024-06-28 03:15:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 307 transitions, 4974 flow [2024-06-28 03:15:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:15:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:15:13,398 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 3878 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:15:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 307 transitions, 4974 flow [2024-06-28 03:15:14,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 307 transitions, 4800 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:14,345 INFO L231 Difference]: Finished difference. Result has 206 places, 279 transitions, 4064 flow [2024-06-28 03:15:14,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=206, PETRI_TRANSITIONS=279} [2024-06-28 03:15:14,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-28 03:15:14,345 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 279 transitions, 4064 flow [2024-06-28 03:15:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:14,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:14,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:14,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:15:14,346 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:14,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -971939638, now seen corresponding path program 6 times [2024-06-28 03:15:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531951334] [2024-06-28 03:15:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531951334] [2024-06-28 03:15:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531951334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610450232] [2024-06-28 03:15:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:15,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:15,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 279 transitions, 4064 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:15,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:15,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:15,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:16,639 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-28 03:15:16,640 INFO L125 PetriNetUnfolderBase]: For 502475/502479 co-relation queries the response was YES. [2024-06-28 03:15:16,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55004 conditions, 6021 events. 3965/6021 cut-off events. For 502475/502479 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33160 event pairs, 1057 based on Foata normal form. 10/6030 useless extension candidates. Maximal degree in co-relation 54901. Up to 5829 conditions per place. [2024-06-28 03:15:16,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 45 changer transitions 0/305 dead transitions. [2024-06-28 03:15:16,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 305 transitions, 4736 flow [2024-06-28 03:15:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:15:16,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 03:15:16,703 INFO L175 Difference]: Start difference. First operand has 206 places, 279 transitions, 4064 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:15:16,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 305 transitions, 4736 flow [2024-06-28 03:15:17,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 305 transitions, 4487 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:17,740 INFO L231 Difference]: Finished difference. Result has 210 places, 279 transitions, 3917 flow [2024-06-28 03:15:17,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3917, PETRI_PLACES=210, PETRI_TRANSITIONS=279} [2024-06-28 03:15:17,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-28 03:15:17,741 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 279 transitions, 3917 flow [2024-06-28 03:15:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:17,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:17,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:17,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:15:17,742 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:17,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash -962735428, now seen corresponding path program 7 times [2024-06-28 03:15:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963626371] [2024-06-28 03:15:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963626371] [2024-06-28 03:15:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963626371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:18,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785389617] [2024-06-28 03:15:18,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:18,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:18,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 279 transitions, 3917 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:18,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:18,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:18,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:19,877 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-28 03:15:19,877 INFO L125 PetriNetUnfolderBase]: For 507224/507228 co-relation queries the response was YES. [2024-06-28 03:15:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54788 conditions, 6021 events. 3965/6021 cut-off events. For 507224/507228 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33047 event pairs, 994 based on Foata normal form. 10/6030 useless extension candidates. Maximal degree in co-relation 54683. Up to 5870 conditions per place. [2024-06-28 03:15:19,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 32 changer transitions 0/308 dead transitions. [2024-06-28 03:15:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4713 flow [2024-06-28 03:15:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:15:19,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:15:19,943 INFO L175 Difference]: Start difference. First operand has 210 places, 279 transitions, 3917 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:15:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4713 flow [2024-06-28 03:15:20,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 4611 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:20,872 INFO L231 Difference]: Finished difference. Result has 211 places, 282 transitions, 4015 flow [2024-06-28 03:15:20,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4015, PETRI_PLACES=211, PETRI_TRANSITIONS=282} [2024-06-28 03:15:20,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-28 03:15:20,873 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 282 transitions, 4015 flow [2024-06-28 03:15:20,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:20,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:20,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:20,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:15:20,874 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)] === [2024-06-28 03:15:20,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1228647910, now seen corresponding path program 7 times [2024-06-28 03:15:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954185282] [2024-06-28 03:15:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:21,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:21,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954185282] [2024-06-28 03:15:21,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954185282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:21,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494496298] [2024-06-28 03:15:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:21,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:21,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:21,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 282 transitions, 4015 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:21,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:21,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:21,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:23,065 INFO L124 PetriNetUnfolderBase]: 3965/6021 cut-off events. [2024-06-28 03:15:23,065 INFO L125 PetriNetUnfolderBase]: For 538579/538583 co-relation queries the response was YES. [2024-06-28 03:15:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54229 conditions, 6021 events. 3965/6021 cut-off events. For 538579/538583 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33014 event pairs, 1016 based on Foata normal form. 34/6054 useless extension candidates. Maximal degree in co-relation 54123. Up to 5687 conditions per place. [2024-06-28 03:15:23,134 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 283 selfloop transitions, 34 changer transitions 0/320 dead transitions. [2024-06-28 03:15:23,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 320 transitions, 4873 flow [2024-06-28 03:15:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:15:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:15:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:15:23,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:15:23,136 INFO L175 Difference]: Start difference. First operand has 211 places, 282 transitions, 4015 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:15:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 320 transitions, 4873 flow [2024-06-28 03:15:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 320 transitions, 4697 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:23,818 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 4047 flow [2024-06-28 03:15:23,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4047, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2024-06-28 03:15:23,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-28 03:15:23,819 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 4047 flow [2024-06-28 03:15:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:15:23,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:23,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:15:23,819 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2052035485, now seen corresponding path program 3 times [2024-06-28 03:15:23,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:23,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716270830] [2024-06-28 03:15:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716270830] [2024-06-28 03:15:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716270830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:24,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094995278] [2024-06-28 03:15:24,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:24,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:24,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:24,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 4047 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:24,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:24,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:24,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:25,528 INFO L124 PetriNetUnfolderBase]: 3959/6015 cut-off events. [2024-06-28 03:15:25,528 INFO L125 PetriNetUnfolderBase]: For 513204/513206 co-relation queries the response was YES. [2024-06-28 03:15:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54187 conditions, 6015 events. 3959/6015 cut-off events. For 513204/513206 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33006 event pairs, 1041 based on Foata normal form. 6/6020 useless extension candidates. Maximal degree in co-relation 54079. Up to 5919 conditions per place. [2024-06-28 03:15:25,597 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 34 changer transitions 0/298 dead transitions. [2024-06-28 03:15:25,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 4781 flow [2024-06-28 03:15:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:15:25,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 03:15:25,600 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 4047 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:15:25,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 4781 flow [2024-06-28 03:15:26,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 4629 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:26,543 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3973 flow [2024-06-28 03:15:26,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-28 03:15:26,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-28 03:15:26,544 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3973 flow [2024-06-28 03:15:26,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:26,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:26,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:26,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:15:26,544 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:26,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash 885356313, now seen corresponding path program 2 times [2024-06-28 03:15:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400385263] [2024-06-28 03:15:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:26,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400385263] [2024-06-28 03:15:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400385263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:27,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:27,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976997974] [2024-06-28 03:15:27,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:27,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:27,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:27,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:27,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:27,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3973 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:27,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:27,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:27,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:28,213 INFO L124 PetriNetUnfolderBase]: 3974/6034 cut-off events. [2024-06-28 03:15:28,213 INFO L125 PetriNetUnfolderBase]: For 510883/510883 co-relation queries the response was YES. [2024-06-28 03:15:28,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53780 conditions, 6034 events. 3974/6034 cut-off events. For 510883/510883 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33081 event pairs, 1035 based on Foata normal form. 3/6036 useless extension candidates. Maximal degree in co-relation 53671. Up to 5990 conditions per place. [2024-06-28 03:15:28,283 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 19 changer transitions 0/303 dead transitions. [2024-06-28 03:15:28,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 303 transitions, 4767 flow [2024-06-28 03:15:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:15:28,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-28 03:15:28,284 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3973 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:15:28,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 303 transitions, 4767 flow [2024-06-28 03:15:28,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 4491 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-28 03:15:28,914 INFO L231 Difference]: Finished difference. Result has 214 places, 288 transitions, 3785 flow [2024-06-28 03:15:28,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=214, PETRI_TRANSITIONS=288} [2024-06-28 03:15:28,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-28 03:15:28,915 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 288 transitions, 3785 flow [2024-06-28 03:15:28,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:28,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:28,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:15:28,915 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1685499753, now seen corresponding path program 3 times [2024-06-28 03:15:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151601951] [2024-06-28 03:15:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:29,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:29,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151601951] [2024-06-28 03:15:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151601951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:29,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:29,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:29,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958164091] [2024-06-28 03:15:29,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:29,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:29,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:29,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:29,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:29,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 288 transitions, 3785 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:29,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:29,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:30,578 INFO L124 PetriNetUnfolderBase]: 3965/6022 cut-off events. [2024-06-28 03:15:30,579 INFO L125 PetriNetUnfolderBase]: For 519141/519141 co-relation queries the response was YES. [2024-06-28 03:15:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53255 conditions, 6022 events. 3965/6022 cut-off events. For 519141/519141 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33040 event pairs, 1033 based on Foata normal form. 3/6024 useless extension candidates. Maximal degree in co-relation 53147. Up to 5995 conditions per place. [2024-06-28 03:15:30,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 14 changer transitions 0/300 dead transitions. [2024-06-28 03:15:30,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 300 transitions, 4409 flow [2024-06-28 03:15:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:15:30,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 03:15:30,649 INFO L175 Difference]: Start difference. First operand has 214 places, 288 transitions, 3785 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:15:30,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 300 transitions, 4409 flow [2024-06-28 03:15:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 300 transitions, 4301 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:31,707 INFO L231 Difference]: Finished difference. Result has 216 places, 288 transitions, 3711 flow [2024-06-28 03:15:31,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3711, PETRI_PLACES=216, PETRI_TRANSITIONS=288} [2024-06-28 03:15:31,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-28 03:15:31,708 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 288 transitions, 3711 flow [2024-06-28 03:15:31,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:31,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:31,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:15:31,709 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:31,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1862862471, now seen corresponding path program 1 times [2024-06-28 03:15:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857221527] [2024-06-28 03:15:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:32,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:32,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857221527] [2024-06-28 03:15:32,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857221527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:32,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:32,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566006634] [2024-06-28 03:15:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:32,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:32,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 288 transitions, 3711 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:32,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:32,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:32,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:33,586 INFO L124 PetriNetUnfolderBase]: 4010/6085 cut-off events. [2024-06-28 03:15:33,586 INFO L125 PetriNetUnfolderBase]: For 526818/526818 co-relation queries the response was YES. [2024-06-28 03:15:33,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53349 conditions, 6085 events. 4010/6085 cut-off events. For 526818/526818 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33431 event pairs, 1031 based on Foata normal form. 9/6093 useless extension candidates. Maximal degree in co-relation 53241. Up to 5907 conditions per place. [2024-06-28 03:15:33,661 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 32 changer transitions 0/317 dead transitions. [2024-06-28 03:15:33,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4621 flow [2024-06-28 03:15:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:15:33,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-28 03:15:33,662 INFO L175 Difference]: Start difference. First operand has 216 places, 288 transitions, 3711 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:15:33,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4621 flow [2024-06-28 03:15:34,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 317 transitions, 4583 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:34,746 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3835 flow [2024-06-28 03:15:34,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3835, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-28 03:15:34,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-28 03:15:34,746 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3835 flow [2024-06-28 03:15:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:34,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:34,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:34,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:15:34,747 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:34,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2051613451, now seen corresponding path program 2 times [2024-06-28 03:15:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154761863] [2024-06-28 03:15:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154761863] [2024-06-28 03:15:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154761863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:35,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865828787] [2024-06-28 03:15:35,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:35,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:35,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:35,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3835 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:35,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:35,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:35,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:36,631 INFO L124 PetriNetUnfolderBase]: 4025/6108 cut-off events. [2024-06-28 03:15:36,631 INFO L125 PetriNetUnfolderBase]: For 536773/536775 co-relation queries the response was YES. [2024-06-28 03:15:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 6108 events. 4025/6108 cut-off events. For 536773/536775 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33609 event pairs, 1045 based on Foata normal form. 3/6110 useless extension candidates. Maximal degree in co-relation 54314. Up to 5915 conditions per place. [2024-06-28 03:15:36,701 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 278 selfloop transitions, 40 changer transitions 0/321 dead transitions. [2024-06-28 03:15:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 321 transitions, 4861 flow [2024-06-28 03:15:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:15:36,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:15:36,702 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3835 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:15:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 321 transitions, 4861 flow [2024-06-28 03:15:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 321 transitions, 4786 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:37,526 INFO L231 Difference]: Finished difference. Result has 221 places, 301 transitions, 3953 flow [2024-06-28 03:15:37,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3953, PETRI_PLACES=221, PETRI_TRANSITIONS=301} [2024-06-28 03:15:37,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-28 03:15:37,526 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 301 transitions, 3953 flow [2024-06-28 03:15:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:37,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:15:37,527 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1685730951, now seen corresponding path program 3 times [2024-06-28 03:15:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:37,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109931225] [2024-06-28 03:15:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109931225] [2024-06-28 03:15:38,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109931225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:38,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:38,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481690168] [2024-06-28 03:15:38,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:38,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:38,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 301 transitions, 3953 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:38,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:38,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:38,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:39,366 INFO L124 PetriNetUnfolderBase]: 4016/6096 cut-off events. [2024-06-28 03:15:39,366 INFO L125 PetriNetUnfolderBase]: For 547945/547947 co-relation queries the response was YES. [2024-06-28 03:15:39,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54509 conditions, 6096 events. 4016/6096 cut-off events. For 547945/547947 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33505 event pairs, 1045 based on Foata normal form. 3/6098 useless extension candidates. Maximal degree in co-relation 54398. Up to 5911 conditions per place. [2024-06-28 03:15:39,436 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 38 changer transitions 0/322 dead transitions. [2024-06-28 03:15:39,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 322 transitions, 4767 flow [2024-06-28 03:15:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:15:39,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:15:39,437 INFO L175 Difference]: Start difference. First operand has 221 places, 301 transitions, 3953 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:15:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 322 transitions, 4767 flow [2024-06-28 03:15:40,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 322 transitions, 4659 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:40,361 INFO L231 Difference]: Finished difference. Result has 225 places, 301 transitions, 3927 flow [2024-06-28 03:15:40,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3927, PETRI_PLACES=225, PETRI_TRANSITIONS=301} [2024-06-28 03:15:40,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-28 03:15:40,362 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 301 transitions, 3927 flow [2024-06-28 03:15:40,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:40,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:40,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:15:40,362 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)] === [2024-06-28 03:15:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1604597502, now seen corresponding path program 1 times [2024-06-28 03:15:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956299050] [2024-06-28 03:15:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:41,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956299050] [2024-06-28 03:15:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956299050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:41,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:41,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:41,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865060626] [2024-06-28 03:15:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:41,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 301 transitions, 3927 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:42,407 INFO L124 PetriNetUnfolderBase]: 4041/6131 cut-off events. [2024-06-28 03:15:42,408 INFO L125 PetriNetUnfolderBase]: For 566428/566430 co-relation queries the response was YES. [2024-06-28 03:15:42,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55005 conditions, 6131 events. 4041/6131 cut-off events. For 566428/566430 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33750 event pairs, 924 based on Foata normal form. 5/6135 useless extension candidates. Maximal degree in co-relation 54892. Up to 5364 conditions per place. [2024-06-28 03:15:42,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 118 changer transitions 0/348 dead transitions. [2024-06-28 03:15:42,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 348 transitions, 5273 flow [2024-06-28 03:15:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:15:42,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 03:15:42,489 INFO L175 Difference]: Start difference. First operand has 225 places, 301 transitions, 3927 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:15:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 348 transitions, 5273 flow [2024-06-28 03:15:43,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 348 transitions, 5179 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:43,615 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 4337 flow [2024-06-28 03:15:43,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4337, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-28 03:15:43,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-28 03:15:43,615 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 4337 flow [2024-06-28 03:15:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:43,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:43,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:15:43,616 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:43,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1604328732, now seen corresponding path program 2 times [2024-06-28 03:15:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560403043] [2024-06-28 03:15:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560403043] [2024-06-28 03:15:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560403043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:44,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435978762] [2024-06-28 03:15:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:44,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:44,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:44,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 4337 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:44,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:44,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:44,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:45,915 INFO L124 PetriNetUnfolderBase]: 4061/6159 cut-off events. [2024-06-28 03:15:45,915 INFO L125 PetriNetUnfolderBase]: For 583622/583624 co-relation queries the response was YES. [2024-06-28 03:15:45,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56550 conditions, 6159 events. 4061/6159 cut-off events. For 583622/583624 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33915 event pairs, 925 based on Foata normal form. 6/6164 useless extension candidates. Maximal degree in co-relation 56435. Up to 5648 conditions per place. [2024-06-28 03:15:45,976 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 264 selfloop transitions, 78 changer transitions 0/345 dead transitions. [2024-06-28 03:15:45,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 345 transitions, 5330 flow [2024-06-28 03:15:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:15:45,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 03:15:45,977 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 4337 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:15:45,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 345 transitions, 5330 flow [2024-06-28 03:15:46,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 345 transitions, 5039 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:46,728 INFO L231 Difference]: Finished difference. Result has 231 places, 317 transitions, 4331 flow [2024-06-28 03:15:46,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4331, PETRI_PLACES=231, PETRI_TRANSITIONS=317} [2024-06-28 03:15:46,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-28 03:15:46,729 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 317 transitions, 4331 flow [2024-06-28 03:15:46,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:46,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:46,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:15:46,730 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:46,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1169711253, now seen corresponding path program 1 times [2024-06-28 03:15:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900398920] [2024-06-28 03:15:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:47,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:47,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900398920] [2024-06-28 03:15:47,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900398920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:47,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:47,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:47,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658715291] [2024-06-28 03:15:47,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:47,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:47,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:47,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:47,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 317 transitions, 4331 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:47,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:47,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:47,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:48,772 INFO L124 PetriNetUnfolderBase]: 4321/6518 cut-off events. [2024-06-28 03:15:48,772 INFO L125 PetriNetUnfolderBase]: For 668786/668788 co-relation queries the response was YES. [2024-06-28 03:15:48,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60306 conditions, 6518 events. 4321/6518 cut-off events. For 668786/668788 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36012 event pairs, 971 based on Foata normal form. 14/6531 useless extension candidates. Maximal degree in co-relation 60191. Up to 5556 conditions per place. [2024-06-28 03:15:48,842 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 292 selfloop transitions, 82 changer transitions 0/377 dead transitions. [2024-06-28 03:15:48,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 377 transitions, 5899 flow [2024-06-28 03:15:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:15:48,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-28 03:15:48,843 INFO L175 Difference]: Start difference. First operand has 231 places, 317 transitions, 4331 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:15:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 377 transitions, 5899 flow [2024-06-28 03:15:49,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 377 transitions, 5699 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:49,963 INFO L231 Difference]: Finished difference. Result has 235 places, 336 transitions, 4663 flow [2024-06-28 03:15:49,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4663, PETRI_PLACES=235, PETRI_TRANSITIONS=336} [2024-06-28 03:15:49,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-28 03:15:49,964 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 336 transitions, 4663 flow [2024-06-28 03:15:49,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:49,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:49,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:15:49,964 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:49,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1173255390, now seen corresponding path program 1 times [2024-06-28 03:15:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63568161] [2024-06-28 03:15:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:50,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:50,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63568161] [2024-06-28 03:15:50,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63568161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:50,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823240615] [2024-06-28 03:15:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:50,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:50,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:50,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:50,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 336 transitions, 4663 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:50,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:50,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:50,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:51,845 INFO L124 PetriNetUnfolderBase]: 4319/6516 cut-off events. [2024-06-28 03:15:51,845 INFO L125 PetriNetUnfolderBase]: For 674289/674291 co-relation queries the response was YES. [2024-06-28 03:15:51,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62017 conditions, 6516 events. 4319/6516 cut-off events. For 674289/674291 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35926 event pairs, 974 based on Foata normal form. 8/6523 useless extension candidates. Maximal degree in co-relation 61899. Up to 6019 conditions per place. [2024-06-28 03:15:51,925 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 292 selfloop transitions, 69 changer transitions 0/364 dead transitions. [2024-06-28 03:15:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 364 transitions, 5775 flow [2024-06-28 03:15:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:15:51,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:15:51,926 INFO L175 Difference]: Start difference. First operand has 235 places, 336 transitions, 4663 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:15:51,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 364 transitions, 5775 flow [2024-06-28 03:15:53,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 364 transitions, 5656 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-28 03:15:53,151 INFO L231 Difference]: Finished difference. Result has 240 places, 340 transitions, 4761 flow [2024-06-28 03:15:53,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4761, PETRI_PLACES=240, PETRI_TRANSITIONS=340} [2024-06-28 03:15:53,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-28 03:15:53,152 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 340 transitions, 4761 flow [2024-06-28 03:15:53,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:53,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:53,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:53,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:15:53,152 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:53,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1178969310, now seen corresponding path program 2 times [2024-06-28 03:15:53,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:53,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85751395] [2024-06-28 03:15:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:53,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:53,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:53,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85751395] [2024-06-28 03:15:53,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85751395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:53,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:53,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58190558] [2024-06-28 03:15:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:54,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:54,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 340 transitions, 4761 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:54,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:54,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:54,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:55,196 INFO L124 PetriNetUnfolderBase]: 4313/6508 cut-off events. [2024-06-28 03:15:55,197 INFO L125 PetriNetUnfolderBase]: For 679580/679582 co-relation queries the response was YES. [2024-06-28 03:15:55,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61920 conditions, 6508 events. 4313/6508 cut-off events. For 679580/679582 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35897 event pairs, 976 based on Foata normal form. 4/6511 useless extension candidates. Maximal degree in co-relation 61799. Up to 6016 conditions per place. [2024-06-28 03:15:55,285 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 73 changer transitions 0/360 dead transitions. [2024-06-28 03:15:55,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 360 transitions, 5787 flow [2024-06-28 03:15:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:15:55,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-28 03:15:55,286 INFO L175 Difference]: Start difference. First operand has 240 places, 340 transitions, 4761 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:15:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 360 transitions, 5787 flow [2024-06-28 03:15:56,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 360 transitions, 5672 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:56,690 INFO L231 Difference]: Finished difference. Result has 243 places, 340 transitions, 4801 flow [2024-06-28 03:15:56,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4801, PETRI_PLACES=243, PETRI_TRANSITIONS=340} [2024-06-28 03:15:56,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-28 03:15:56,691 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 340 transitions, 4801 flow [2024-06-28 03:15:56,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:56,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:56,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:56,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:15:56,691 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)] === [2024-06-28 03:15:56,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash 223002891, now seen corresponding path program 1 times [2024-06-28 03:15:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061100652] [2024-06-28 03:15:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:58,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061100652] [2024-06-28 03:15:58,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061100652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:58,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:58,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:58,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913128649] [2024-06-28 03:15:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:58,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:58,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:58,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:58,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 340 transitions, 4801 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:58,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:58,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:58,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:59,851 INFO L124 PetriNetUnfolderBase]: 4381/6624 cut-off events. [2024-06-28 03:15:59,851 INFO L125 PetriNetUnfolderBase]: For 746459/746461 co-relation queries the response was YES. [2024-06-28 03:15:59,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63280 conditions, 6624 events. 4381/6624 cut-off events. For 746459/746461 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36822 event pairs, 942 based on Foata normal form. 20/6643 useless extension candidates. Maximal degree in co-relation 63158. Up to 5850 conditions per place. [2024-06-28 03:15:59,930 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 290 selfloop transitions, 87 changer transitions 0/380 dead transitions. [2024-06-28 03:15:59,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 380 transitions, 5902 flow [2024-06-28 03:15:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:15:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:15:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:15:59,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-28 03:15:59,931 INFO L175 Difference]: Start difference. First operand has 243 places, 340 transitions, 4801 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:15:59,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 380 transitions, 5902 flow [2024-06-28 03:16:01,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 380 transitions, 5785 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:01,230 INFO L231 Difference]: Finished difference. Result has 248 places, 342 transitions, 4980 flow [2024-06-28 03:16:01,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4980, PETRI_PLACES=248, PETRI_TRANSITIONS=342} [2024-06-28 03:16:01,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-28 03:16:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 342 transitions, 4980 flow [2024-06-28 03:16:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:16:01,231 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:01,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1305344973, now seen corresponding path program 2 times [2024-06-28 03:16:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907061655] [2024-06-28 03:16:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907061655] [2024-06-28 03:16:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907061655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:02,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135362423] [2024-06-28 03:16:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:02,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:02,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 342 transitions, 4980 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:02,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:02,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:02,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:03,598 INFO L124 PetriNetUnfolderBase]: 4699/7065 cut-off events. [2024-06-28 03:16:03,599 INFO L125 PetriNetUnfolderBase]: For 821702/821704 co-relation queries the response was YES. [2024-06-28 03:16:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69373 conditions, 7065 events. 4699/7065 cut-off events. For 821702/821704 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39463 event pairs, 1008 based on Foata normal form. 14/7078 useless extension candidates. Maximal degree in co-relation 69250. Up to 5842 conditions per place. [2024-06-28 03:16:03,695 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 298 selfloop transitions, 90 changer transitions 0/391 dead transitions. [2024-06-28 03:16:03,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 391 transitions, 6692 flow [2024-06-28 03:16:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:16:03,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-28 03:16:03,696 INFO L175 Difference]: Start difference. First operand has 248 places, 342 transitions, 4980 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:16:03,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 391 transitions, 6692 flow [2024-06-28 03:16:05,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 391 transitions, 6423 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:05,232 INFO L231 Difference]: Finished difference. Result has 250 places, 355 transitions, 5170 flow [2024-06-28 03:16:05,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5170, PETRI_PLACES=250, PETRI_TRANSITIONS=355} [2024-06-28 03:16:05,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-28 03:16:05,233 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 355 transitions, 5170 flow [2024-06-28 03:16:05,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:05,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:16:05,234 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:05,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1178965683, now seen corresponding path program 3 times [2024-06-28 03:16:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605599370] [2024-06-28 03:16:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:06,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605599370] [2024-06-28 03:16:06,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605599370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:06,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:06,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:06,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252268974] [2024-06-28 03:16:06,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:06,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:06,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:06,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:06,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 355 transitions, 5170 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:06,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:06,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:06,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:07,726 INFO L124 PetriNetUnfolderBase]: 4681/7044 cut-off events. [2024-06-28 03:16:07,726 INFO L125 PetriNetUnfolderBase]: For 826076/826078 co-relation queries the response was YES. [2024-06-28 03:16:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68860 conditions, 7044 events. 4681/7044 cut-off events. For 826076/826078 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39354 event pairs, 1007 based on Foata normal form. 14/7057 useless extension candidates. Maximal degree in co-relation 68735. Up to 5838 conditions per place. [2024-06-28 03:16:07,803 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 298 selfloop transitions, 92 changer transitions 0/393 dead transitions. [2024-06-28 03:16:07,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 393 transitions, 6568 flow [2024-06-28 03:16:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:16:07,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-28 03:16:07,805 INFO L175 Difference]: Start difference. First operand has 250 places, 355 transitions, 5170 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:16:07,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 393 transitions, 6568 flow [2024-06-28 03:16:08,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 393 transitions, 6311 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:08,899 INFO L231 Difference]: Finished difference. Result has 254 places, 357 transitions, 5165 flow [2024-06-28 03:16:08,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4937, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5165, PETRI_PLACES=254, PETRI_TRANSITIONS=357} [2024-06-28 03:16:08,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-28 03:16:08,899 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 357 transitions, 5165 flow [2024-06-28 03:16:08,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:08,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:08,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:16:08,900 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)] === [2024-06-28 03:16:08,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1178965342, now seen corresponding path program 3 times [2024-06-28 03:16:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689134323] [2024-06-28 03:16:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:08,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:10,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689134323] [2024-06-28 03:16:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689134323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:10,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:10,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703250500] [2024-06-28 03:16:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:10,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:10,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 357 transitions, 5165 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:10,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:10,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:10,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:11,981 INFO L124 PetriNetUnfolderBase]: 4707/7081 cut-off events. [2024-06-28 03:16:11,982 INFO L125 PetriNetUnfolderBase]: For 823029/823031 co-relation queries the response was YES. [2024-06-28 03:16:12,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68541 conditions, 7081 events. 4707/7081 cut-off events. For 823029/823031 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 39546 event pairs, 1040 based on Foata normal form. 6/7086 useless extension candidates. Maximal degree in co-relation 68415. Up to 6571 conditions per place. [2024-06-28 03:16:12,087 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 303 selfloop transitions, 79 changer transitions 0/385 dead transitions. [2024-06-28 03:16:12,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 385 transitions, 6384 flow [2024-06-28 03:16:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:16:12,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 03:16:12,089 INFO L175 Difference]: Start difference. First operand has 254 places, 357 transitions, 5165 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:16:12,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 385 transitions, 6384 flow [2024-06-28 03:16:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 385 transitions, 6206 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:16:13,535 INFO L231 Difference]: Finished difference. Result has 257 places, 362 transitions, 5276 flow [2024-06-28 03:16:13,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5276, PETRI_PLACES=257, PETRI_TRANSITIONS=362} [2024-06-28 03:16:13,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-28 03:16:13,536 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 362 transitions, 5276 flow [2024-06-28 03:16:13,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:13,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:13,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:13,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:16:13,537 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)] === [2024-06-28 03:16:13,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2054803420, now seen corresponding path program 3 times [2024-06-28 03:16:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:13,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705843310] [2024-06-28 03:16:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705843310] [2024-06-28 03:16:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705843310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630480568] [2024-06-28 03:16:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:14,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:14,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:14,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 362 transitions, 5276 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:14,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:14,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:14,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:15,657 INFO L124 PetriNetUnfolderBase]: 4834/7260 cut-off events. [2024-06-28 03:16:15,658 INFO L125 PetriNetUnfolderBase]: For 849462/849462 co-relation queries the response was YES. [2024-06-28 03:16:15,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70592 conditions, 7260 events. 4834/7260 cut-off events. For 849462/849462 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40613 event pairs, 1193 based on Foata normal form. 3/7262 useless extension candidates. Maximal degree in co-relation 70465. Up to 7126 conditions per place. [2024-06-28 03:16:15,755 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 367 selfloop transitions, 41 changer transitions 0/411 dead transitions. [2024-06-28 03:16:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 411 transitions, 6881 flow [2024-06-28 03:16:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:16:15,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-28 03:16:15,756 INFO L175 Difference]: Start difference. First operand has 257 places, 362 transitions, 5276 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:16:15,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 411 transitions, 6881 flow [2024-06-28 03:16:17,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 411 transitions, 6629 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:17,417 INFO L231 Difference]: Finished difference. Result has 261 places, 387 transitions, 5705 flow [2024-06-28 03:16:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=261, PETRI_TRANSITIONS=387} [2024-06-28 03:16:17,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-28 03:16:17,418 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 387 transitions, 5705 flow [2024-06-28 03:16:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:17,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:16:17,418 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)] === [2024-06-28 03:16:17,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1925602082, now seen corresponding path program 4 times [2024-06-28 03:16:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703556362] [2024-06-28 03:16:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:18,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:18,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703556362] [2024-06-28 03:16:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703556362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:18,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539827070] [2024-06-28 03:16:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:18,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:18,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 387 transitions, 5705 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:18,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:18,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:18,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:19,521 INFO L124 PetriNetUnfolderBase]: 4795/7203 cut-off events. [2024-06-28 03:16:19,522 INFO L125 PetriNetUnfolderBase]: For 864561/864561 co-relation queries the response was YES. [2024-06-28 03:16:19,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70142 conditions, 7203 events. 4795/7203 cut-off events. For 864561/864561 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40259 event pairs, 1173 based on Foata normal form. 3/7205 useless extension candidates. Maximal degree in co-relation 70012. Up to 6978 conditions per place. [2024-06-28 03:16:19,621 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 57 changer transitions 0/405 dead transitions. [2024-06-28 03:16:19,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 405 transitions, 6705 flow [2024-06-28 03:16:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:16:19,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 03:16:19,622 INFO L175 Difference]: Start difference. First operand has 261 places, 387 transitions, 5705 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:16:19,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 405 transitions, 6705 flow [2024-06-28 03:16:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 405 transitions, 6639 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:21,259 INFO L231 Difference]: Finished difference. Result has 265 places, 387 transitions, 5769 flow [2024-06-28 03:16:21,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5769, PETRI_PLACES=265, PETRI_TRANSITIONS=387} [2024-06-28 03:16:21,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-28 03:16:21,260 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 387 transitions, 5769 flow [2024-06-28 03:16:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:21,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:21,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:16:21,260 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)] === [2024-06-28 03:16:21,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1264214116, now seen corresponding path program 5 times [2024-06-28 03:16:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549528887] [2024-06-28 03:16:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:21,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:21,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549528887] [2024-06-28 03:16:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549528887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:21,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:21,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823744206] [2024-06-28 03:16:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:21,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:21,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:21,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:21,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 387 transitions, 5769 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:21,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:21,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:21,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:23,372 INFO L124 PetriNetUnfolderBase]: 4777/7180 cut-off events. [2024-06-28 03:16:23,372 INFO L125 PetriNetUnfolderBase]: For 881349/881349 co-relation queries the response was YES. [2024-06-28 03:16:23,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69918 conditions, 7180 events. 4777/7180 cut-off events. For 881349/881349 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40124 event pairs, 1196 based on Foata normal form. 6/7185 useless extension candidates. Maximal degree in co-relation 69787. Up to 7095 conditions per place. [2024-06-28 03:16:23,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 367 selfloop transitions, 33 changer transitions 0/403 dead transitions. [2024-06-28 03:16:23,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 403 transitions, 6668 flow [2024-06-28 03:16:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:16:23,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-28 03:16:23,469 INFO L175 Difference]: Start difference. First operand has 265 places, 387 transitions, 5769 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:16:23,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 403 transitions, 6668 flow [2024-06-28 03:16:25,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 6522 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:25,448 INFO L231 Difference]: Finished difference. Result has 266 places, 390 transitions, 5767 flow [2024-06-28 03:16:25,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5767, PETRI_PLACES=266, PETRI_TRANSITIONS=390} [2024-06-28 03:16:25,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-28 03:16:25,448 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 390 transitions, 5767 flow [2024-06-28 03:16:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:25,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:25,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:25,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:16:25,449 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:25,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash -858362801, now seen corresponding path program 2 times [2024-06-28 03:16:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804040966] [2024-06-28 03:16:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:25,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:26,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804040966] [2024-06-28 03:16:26,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804040966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:26,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:26,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395165520] [2024-06-28 03:16:26,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:26,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:26,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:26,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:26,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:26,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 390 transitions, 5767 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:26,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:26,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:26,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:28,306 INFO L124 PetriNetUnfolderBase]: 4838/7281 cut-off events. [2024-06-28 03:16:28,306 INFO L125 PetriNetUnfolderBase]: For 921319/921327 co-relation queries the response was YES. [2024-06-28 03:16:28,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70643 conditions, 7281 events. 4838/7281 cut-off events. For 921319/921327 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40823 event pairs, 1120 based on Foata normal form. 26/7306 useless extension candidates. Maximal degree in co-relation 70511. Up to 7013 conditions per place. [2024-06-28 03:16:28,400 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 39 changer transitions 0/426 dead transitions. [2024-06-28 03:16:28,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 426 transitions, 6824 flow [2024-06-28 03:16:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:16:28,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-28 03:16:28,401 INFO L175 Difference]: Start difference. First operand has 266 places, 390 transitions, 5767 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:16:28,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 426 transitions, 6824 flow [2024-06-28 03:16:30,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 426 transitions, 6725 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:30,172 INFO L231 Difference]: Finished difference. Result has 269 places, 392 transitions, 5865 flow [2024-06-28 03:16:30,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5865, PETRI_PLACES=269, PETRI_TRANSITIONS=392} [2024-06-28 03:16:30,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-28 03:16:30,173 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 392 transitions, 5865 flow [2024-06-28 03:16:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:30,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:30,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:30,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:16:30,174 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:30,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -65356379, now seen corresponding path program 3 times [2024-06-28 03:16:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862151958] [2024-06-28 03:16:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:31,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:31,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862151958] [2024-06-28 03:16:31,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862151958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:31,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:31,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115727723] [2024-06-28 03:16:31,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:31,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:31,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 392 transitions, 5865 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:33,102 INFO L124 PetriNetUnfolderBase]: 4960/7487 cut-off events. [2024-06-28 03:16:33,102 INFO L125 PetriNetUnfolderBase]: For 958533/958541 co-relation queries the response was YES. [2024-06-28 03:16:33,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72462 conditions, 7487 events. 4960/7487 cut-off events. For 958533/958541 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 42522 event pairs, 1172 based on Foata normal form. 26/7512 useless extension candidates. Maximal degree in co-relation 72329. Up to 7059 conditions per place. [2024-06-28 03:16:33,207 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2024-06-28 03:16:33,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 430 transitions, 6976 flow [2024-06-28 03:16:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:16:33,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-28 03:16:33,208 INFO L175 Difference]: Start difference. First operand has 269 places, 392 transitions, 5865 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:16:33,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 430 transitions, 6976 flow [2024-06-28 03:16:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 430 transitions, 6803 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:35,216 INFO L231 Difference]: Finished difference. Result has 271 places, 396 transitions, 5972 flow [2024-06-28 03:16:35,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=271, PETRI_TRANSITIONS=396} [2024-06-28 03:16:35,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-28 03:16:35,217 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 396 transitions, 5972 flow [2024-06-28 03:16:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:35,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:35,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:16:35,217 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:35,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash -786095815, now seen corresponding path program 4 times [2024-06-28 03:16:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263825387] [2024-06-28 03:16:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:35,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:36,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263825387] [2024-06-28 03:16:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263825387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:36,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:36,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647494550] [2024-06-28 03:16:36,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:36,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:36,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 396 transitions, 5972 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:36,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:36,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:36,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:38,231 INFO L124 PetriNetUnfolderBase]: 4960/7487 cut-off events. [2024-06-28 03:16:38,232 INFO L125 PetriNetUnfolderBase]: For 956329/956337 co-relation queries the response was YES. [2024-06-28 03:16:38,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71720 conditions, 7487 events. 4960/7487 cut-off events. For 956329/956337 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42587 event pairs, 1181 based on Foata normal form. 26/7512 useless extension candidates. Maximal degree in co-relation 71586. Up to 7164 conditions per place. [2024-06-28 03:16:38,338 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 46 changer transitions 0/431 dead transitions. [2024-06-28 03:16:38,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 431 transitions, 7050 flow [2024-06-28 03:16:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:16:38,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 03:16:38,339 INFO L175 Difference]: Start difference. First operand has 271 places, 396 transitions, 5972 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:16:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 431 transitions, 7050 flow [2024-06-28 03:16:40,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 431 transitions, 6828 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:40,388 INFO L231 Difference]: Finished difference. Result has 273 places, 398 transitions, 5972 flow [2024-06-28 03:16:40,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=273, PETRI_TRANSITIONS=398} [2024-06-28 03:16:40,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-28 03:16:40,389 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 398 transitions, 5972 flow [2024-06-28 03:16:40,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:40,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:40,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:16:40,389 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:40,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -65125739, now seen corresponding path program 5 times [2024-06-28 03:16:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952941716] [2024-06-28 03:16:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952941716] [2024-06-28 03:16:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952941716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:41,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:41,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069984481] [2024-06-28 03:16:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:41,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:41,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 398 transitions, 5972 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:41,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:41,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:43,278 INFO L124 PetriNetUnfolderBase]: 5021/7590 cut-off events. [2024-06-28 03:16:43,278 INFO L125 PetriNetUnfolderBase]: For 980439/980447 co-relation queries the response was YES. [2024-06-28 03:16:43,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72349 conditions, 7590 events. 5021/7590 cut-off events. For 980439/980447 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43327 event pairs, 1178 based on Foata normal form. 26/7615 useless extension candidates. Maximal degree in co-relation 72214. Up to 7047 conditions per place. [2024-06-28 03:16:43,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 67 changer transitions 0/434 dead transitions. [2024-06-28 03:16:43,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 434 transitions, 7059 flow [2024-06-28 03:16:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:16:43,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-28 03:16:43,384 INFO L175 Difference]: Start difference. First operand has 273 places, 398 transitions, 5972 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:16:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 434 transitions, 7059 flow [2024-06-28 03:16:45,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 434 transitions, 6874 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:45,419 INFO L231 Difference]: Finished difference. Result has 276 places, 400 transitions, 6053 flow [2024-06-28 03:16:45,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6053, PETRI_PLACES=276, PETRI_TRANSITIONS=400} [2024-06-28 03:16:45,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 03:16:45,419 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 400 transitions, 6053 flow [2024-06-28 03:16:45,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:16:45,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:45,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:45,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:16:45,420 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:45,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash -65363075, now seen corresponding path program 1 times [2024-06-28 03:16:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:45,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268816785] [2024-06-28 03:16:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268816785] [2024-06-28 03:16:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268816785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602265350] [2024-06-28 03:16:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:46,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:46,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:46,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 400 transitions, 6053 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:46,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:46,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:46,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:48,503 INFO L124 PetriNetUnfolderBase]: 5021/7590 cut-off events. [2024-06-28 03:16:48,503 INFO L125 PetriNetUnfolderBase]: For 979383/979391 co-relation queries the response was YES. [2024-06-28 03:16:48,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71185 conditions, 7590 events. 5021/7590 cut-off events. For 979383/979391 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 43300 event pairs, 1192 based on Foata normal form. 32/7621 useless extension candidates. Maximal degree in co-relation 71049. Up to 6833 conditions per place. [2024-06-28 03:16:48,610 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 68 changer transitions 0/436 dead transitions. [2024-06-28 03:16:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 436 transitions, 6984 flow [2024-06-28 03:16:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:16:48,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-28 03:16:48,611 INFO L175 Difference]: Start difference. First operand has 276 places, 400 transitions, 6053 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:16:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 436 transitions, 6984 flow [2024-06-28 03:16:50,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 436 transitions, 6752 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:50,850 INFO L231 Difference]: Finished difference. Result has 277 places, 400 transitions, 5909 flow [2024-06-28 03:16:50,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=277, PETRI_TRANSITIONS=400} [2024-06-28 03:16:50,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-28 03:16:50,851 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 400 transitions, 5909 flow [2024-06-28 03:16:50,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:50,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:50,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:50,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:16:50,851 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)] === [2024-06-28 03:16:50,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 811414400, now seen corresponding path program 6 times [2024-06-28 03:16:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:50,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129014362] [2024-06-28 03:16:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129014362] [2024-06-28 03:16:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129014362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:51,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749731626] [2024-06-28 03:16:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:51,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:51,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:51,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:51,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 400 transitions, 5909 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:51,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:51,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:53,201 INFO L124 PetriNetUnfolderBase]: 4997/7556 cut-off events. [2024-06-28 03:16:53,201 INFO L125 PetriNetUnfolderBase]: For 932874/932876 co-relation queries the response was YES. [2024-06-28 03:16:53,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70610 conditions, 7556 events. 4997/7556 cut-off events. For 932874/932876 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43077 event pairs, 1237 based on Foata normal form. 4/7559 useless extension candidates. Maximal degree in co-relation 70473. Up to 7433 conditions per place. [2024-06-28 03:16:53,301 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 44 changer transitions 0/412 dead transitions. [2024-06-28 03:16:53,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 412 transitions, 6913 flow [2024-06-28 03:16:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:16:53,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 03:16:53,303 INFO L175 Difference]: Start difference. First operand has 277 places, 400 transitions, 5909 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:16:53,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 412 transitions, 6913 flow [2024-06-28 03:16:55,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 412 transitions, 6651 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-28 03:16:55,576 INFO L231 Difference]: Finished difference. Result has 275 places, 400 transitions, 5747 flow [2024-06-28 03:16:55,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5747, PETRI_PLACES=275, PETRI_TRANSITIONS=400} [2024-06-28 03:16:55,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-28 03:16:55,577 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 400 transitions, 5747 flow [2024-06-28 03:16:55,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:55,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:55,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:55,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:16:55,577 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)] === [2024-06-28 03:16:55,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1279433914, now seen corresponding path program 7 times [2024-06-28 03:16:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94799036] [2024-06-28 03:16:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:55,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:56,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:56,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94799036] [2024-06-28 03:16:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94799036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:56,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536115479] [2024-06-28 03:16:56,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:56,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:56,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:56,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 400 transitions, 5747 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:56,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:56,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:57,697 INFO L124 PetriNetUnfolderBase]: 4944/7469 cut-off events. [2024-06-28 03:16:57,697 INFO L125 PetriNetUnfolderBase]: For 890632/890634 co-relation queries the response was YES. [2024-06-28 03:16:57,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68415 conditions, 7469 events. 4944/7469 cut-off events. For 890632/890634 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 42459 event pairs, 1229 based on Foata normal form. 3/7471 useless extension candidates. Maximal degree in co-relation 68279. Up to 7399 conditions per place. [2024-06-28 03:16:57,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 30 changer transitions 0/410 dead transitions. [2024-06-28 03:16:57,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 410 transitions, 6587 flow [2024-06-28 03:16:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:16:57,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 03:16:57,786 INFO L175 Difference]: Start difference. First operand has 275 places, 400 transitions, 5747 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:16:57,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 410 transitions, 6587 flow [2024-06-28 03:16:59,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 410 transitions, 6466 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:59,467 INFO L231 Difference]: Finished difference. Result has 276 places, 400 transitions, 5692 flow [2024-06-28 03:16:59,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5692, PETRI_PLACES=276, PETRI_TRANSITIONS=400} [2024-06-28 03:16:59,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 03:16:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 400 transitions, 5692 flow [2024-06-28 03:16:59,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:59,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:59,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:59,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:16:59,468 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)] === [2024-06-28 03:16:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1689575806, now seen corresponding path program 1 times [2024-06-28 03:16:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401573376] [2024-06-28 03:16:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:00,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401573376] [2024-06-28 03:17:00,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401573376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:00,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:00,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449739033] [2024-06-28 03:17:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:00,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:00,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:00,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:00,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 400 transitions, 5692 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:00,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:00,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:02,031 INFO L124 PetriNetUnfolderBase]: 4938/7459 cut-off events. [2024-06-28 03:17:02,031 INFO L125 PetriNetUnfolderBase]: For 907949/907949 co-relation queries the response was YES. [2024-06-28 03:17:02,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68397 conditions, 7459 events. 4938/7459 cut-off events. For 907949/907949 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 42393 event pairs, 1244 based on Foata normal form. 2/7460 useless extension candidates. Maximal degree in co-relation 68260. Up to 7425 conditions per place. [2024-06-28 03:17:02,127 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 17 changer transitions 0/416 dead transitions. [2024-06-28 03:17:02,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 416 transitions, 6610 flow [2024-06-28 03:17:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 03:17:02,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 03:17:02,128 INFO L175 Difference]: Start difference. First operand has 276 places, 400 transitions, 5692 flow. Second operand 8 states and 120 transitions. [2024-06-28 03:17:02,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 416 transitions, 6610 flow [2024-06-28 03:17:03,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 416 transitions, 6429 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 03:17:03,843 INFO L231 Difference]: Finished difference. Result has 275 places, 403 transitions, 5617 flow [2024-06-28 03:17:03,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5617, PETRI_PLACES=275, PETRI_TRANSITIONS=403} [2024-06-28 03:17:03,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-28 03:17:03,844 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 403 transitions, 5617 flow [2024-06-28 03:17:03,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:03,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:03,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:17:03,844 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)] === [2024-06-28 03:17:03,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1291684505, now seen corresponding path program 4 times [2024-06-28 03:17:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317657303] [2024-06-28 03:17:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:04,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:04,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317657303] [2024-06-28 03:17:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317657303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:04,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:04,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126362021] [2024-06-28 03:17:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:04,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 403 transitions, 5617 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:04,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:04,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:04,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:06,328 INFO L124 PetriNetUnfolderBase]: 5094/7677 cut-off events. [2024-06-28 03:17:06,328 INFO L125 PetriNetUnfolderBase]: For 974431/974433 co-relation queries the response was YES. [2024-06-28 03:17:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70991 conditions, 7677 events. 5094/7677 cut-off events. For 974431/974433 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 43670 event pairs, 1225 based on Foata normal form. 14/7690 useless extension candidates. Maximal degree in co-relation 70853. Up to 7259 conditions per place. [2024-06-28 03:17:06,413 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 374 selfloop transitions, 68 changer transitions 0/445 dead transitions. [2024-06-28 03:17:06,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 445 transitions, 7365 flow [2024-06-28 03:17:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:17:06,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:17:06,415 INFO L175 Difference]: Start difference. First operand has 275 places, 403 transitions, 5617 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:17:06,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 445 transitions, 7365 flow [2024-06-28 03:17:08,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 445 transitions, 7275 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:08,448 INFO L231 Difference]: Finished difference. Result has 279 places, 422 transitions, 6077 flow [2024-06-28 03:17:08,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6077, PETRI_PLACES=279, PETRI_TRANSITIONS=422} [2024-06-28 03:17:08,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-28 03:17:08,449 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 422 transitions, 6077 flow [2024-06-28 03:17:08,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:08,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:08,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:17:08,450 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)] === [2024-06-28 03:17:08,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1689129933, now seen corresponding path program 5 times [2024-06-28 03:17:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:08,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195558195] [2024-06-28 03:17:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:09,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195558195] [2024-06-28 03:17:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195558195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:09,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:09,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46822340] [2024-06-28 03:17:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:09,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:09,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:09,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:09,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 422 transitions, 6077 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:09,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:09,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:09,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:10,979 INFO L124 PetriNetUnfolderBase]: 5268/7920 cut-off events. [2024-06-28 03:17:10,980 INFO L125 PetriNetUnfolderBase]: For 1040464/1040466 co-relation queries the response was YES. [2024-06-28 03:17:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75223 conditions, 7920 events. 5268/7920 cut-off events. For 1040464/1040466 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 45179 event pairs, 1301 based on Foata normal form. 14/7933 useless extension candidates. Maximal degree in co-relation 75082. Up to 7660 conditions per place. [2024-06-28 03:17:11,071 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 399 selfloop transitions, 49 changer transitions 0/451 dead transitions. [2024-06-28 03:17:11,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 451 transitions, 7588 flow [2024-06-28 03:17:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:17:11,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 03:17:11,072 INFO L175 Difference]: Start difference. First operand has 279 places, 422 transitions, 6077 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:17:11,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 451 transitions, 7588 flow [2024-06-28 03:17:13,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 451 transitions, 7358 flow, removed 102 selfloop flow, removed 2 redundant places. [2024-06-28 03:17:13,547 INFO L231 Difference]: Finished difference. Result has 286 places, 432 transitions, 6237 flow [2024-06-28 03:17:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=286, PETRI_TRANSITIONS=432} [2024-06-28 03:17:13,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-28 03:17:13,547 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 432 transitions, 6237 flow [2024-06-28 03:17:13,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:13,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:13,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:17:13,548 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)] === [2024-06-28 03:17:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1676242923, now seen corresponding path program 6 times [2024-06-28 03:17:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747728988] [2024-06-28 03:17:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:14,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:14,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747728988] [2024-06-28 03:17:14,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747728988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:14,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:14,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:14,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441596687] [2024-06-28 03:17:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:14,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:14,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:14,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 432 transitions, 6237 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:16,213 INFO L124 PetriNetUnfolderBase]: 5250/7899 cut-off events. [2024-06-28 03:17:16,213 INFO L125 PetriNetUnfolderBase]: For 1024269/1024271 co-relation queries the response was YES. [2024-06-28 03:17:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73535 conditions, 7899 events. 5250/7899 cut-off events. For 1024269/1024271 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45084 event pairs, 1270 based on Foata normal form. 14/7912 useless extension candidates. Maximal degree in co-relation 73391. Up to 7365 conditions per place. [2024-06-28 03:17:16,317 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 379 selfloop transitions, 73 changer transitions 0/455 dead transitions. [2024-06-28 03:17:16,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 455 transitions, 7679 flow [2024-06-28 03:17:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:17:16,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:17:16,319 INFO L175 Difference]: Start difference. First operand has 286 places, 432 transitions, 6237 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:17:16,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 455 transitions, 7679 flow [2024-06-28 03:17:18,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 455 transitions, 7475 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:18,501 INFO L231 Difference]: Finished difference. Result has 289 places, 432 transitions, 6188 flow [2024-06-28 03:17:18,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6188, PETRI_PLACES=289, PETRI_TRANSITIONS=432} [2024-06-28 03:17:18,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-28 03:17:18,501 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 432 transitions, 6188 flow [2024-06-28 03:17:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:18,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:18,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:17:18,502 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)] === [2024-06-28 03:17:18,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1676231422, now seen corresponding path program 4 times [2024-06-28 03:17:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:18,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20756755] [2024-06-28 03:17:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20756755] [2024-06-28 03:17:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20756755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:19,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43519727] [2024-06-28 03:17:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:19,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:19,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 432 transitions, 6188 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:19,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:19,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:19,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:20,949 INFO L124 PetriNetUnfolderBase]: 5221/7854 cut-off events. [2024-06-28 03:17:20,949 INFO L125 PetriNetUnfolderBase]: For 1013314/1013316 co-relation queries the response was YES. [2024-06-28 03:17:21,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72563 conditions, 7854 events. 5221/7854 cut-off events. For 1013314/1013316 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44763 event pairs, 1299 based on Foata normal form. 6/7859 useless extension candidates. Maximal degree in co-relation 72418. Up to 7719 conditions per place. [2024-06-28 03:17:21,063 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 391 selfloop transitions, 52 changer transitions 0/446 dead transitions. [2024-06-28 03:17:21,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 7120 flow [2024-06-28 03:17:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:17:21,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:17:21,065 INFO L175 Difference]: Start difference. First operand has 289 places, 432 transitions, 6188 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:17:21,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 7120 flow [2024-06-28 03:17:23,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 446 transitions, 6826 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 03:17:23,237 INFO L231 Difference]: Finished difference. Result has 289 places, 432 transitions, 6006 flow [2024-06-28 03:17:23,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6006, PETRI_PLACES=289, PETRI_TRANSITIONS=432} [2024-06-28 03:17:23,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-28 03:17:23,238 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 432 transitions, 6006 flow [2024-06-28 03:17:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:23,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:23,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:17:23,238 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)] === [2024-06-28 03:17:23,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1027280697, now seen corresponding path program 1 times [2024-06-28 03:17:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291934967] [2024-06-28 03:17:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291934967] [2024-06-28 03:17:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291934967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510108285] [2024-06-28 03:17:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:23,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:23,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 432 transitions, 6006 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:23,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:25,680 INFO L124 PetriNetUnfolderBase]: 5251/7895 cut-off events. [2024-06-28 03:17:25,680 INFO L125 PetriNetUnfolderBase]: For 1040076/1040080 co-relation queries the response was YES. [2024-06-28 03:17:25,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72021 conditions, 7895 events. 5251/7895 cut-off events. For 1040076/1040080 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44977 event pairs, 1309 based on Foata normal form. 10/7904 useless extension candidates. Maximal degree in co-relation 71877. Up to 7660 conditions per place. [2024-06-28 03:17:25,784 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 54 changer transitions 0/465 dead transitions. [2024-06-28 03:17:25,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 465 transitions, 7251 flow [2024-06-28 03:17:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:17:25,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 03:17:25,785 INFO L175 Difference]: Start difference. First operand has 289 places, 432 transitions, 6006 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:17:25,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 465 transitions, 7251 flow [2024-06-28 03:17:28,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 465 transitions, 7107 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:28,461 INFO L231 Difference]: Finished difference. Result has 290 places, 436 transitions, 6037 flow [2024-06-28 03:17:28,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6037, PETRI_PLACES=290, PETRI_TRANSITIONS=436} [2024-06-28 03:17:28,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-28 03:17:28,461 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 436 transitions, 6037 flow [2024-06-28 03:17:28,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:28,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:28,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:28,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:17:28,462 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)] === [2024-06-28 03:17:28,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash -870762547, now seen corresponding path program 2 times [2024-06-28 03:17:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:28,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742756165] [2024-06-28 03:17:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:28,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:29,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742756165] [2024-06-28 03:17:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742756165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:29,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:29,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:29,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182705490] [2024-06-28 03:17:29,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:29,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:29,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 436 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:29,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:29,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:29,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:31,224 INFO L124 PetriNetUnfolderBase]: 5281/7938 cut-off events. [2024-06-28 03:17:31,224 INFO L125 PetriNetUnfolderBase]: For 1064850/1064850 co-relation queries the response was YES. [2024-06-28 03:17:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72556 conditions, 7938 events. 5281/7938 cut-off events. For 1064850/1064850 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45228 event pairs, 1311 based on Foata normal form. 6/7943 useless extension candidates. Maximal degree in co-relation 72411. Up to 7682 conditions per place. [2024-06-28 03:17:31,313 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 53 changer transitions 0/468 dead transitions. [2024-06-28 03:17:31,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 468 transitions, 7298 flow [2024-06-28 03:17:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:17:31,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:17:31,315 INFO L175 Difference]: Start difference. First operand has 290 places, 436 transitions, 6037 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:17:31,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 468 transitions, 7298 flow [2024-06-28 03:17:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 468 transitions, 7122 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:33,128 INFO L231 Difference]: Finished difference. Result has 292 places, 440 transitions, 6041 flow [2024-06-28 03:17:33,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5873, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=292, PETRI_TRANSITIONS=440} [2024-06-28 03:17:33,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-28 03:17:33,129 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 440 transitions, 6041 flow [2024-06-28 03:17:33,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:33,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:33,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:17:33,129 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)] === [2024-06-28 03:17:33,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash 824493641, now seen corresponding path program 3 times [2024-06-28 03:17:33,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84938273] [2024-06-28 03:17:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:33,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84938273] [2024-06-28 03:17:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84938273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:33,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:33,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310482297] [2024-06-28 03:17:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:33,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:33,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 440 transitions, 6041 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:33,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:33,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:35,758 INFO L124 PetriNetUnfolderBase]: 5311/7981 cut-off events. [2024-06-28 03:17:35,758 INFO L125 PetriNetUnfolderBase]: For 1088357/1088357 co-relation queries the response was YES. [2024-06-28 03:17:35,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73051 conditions, 7981 events. 5311/7981 cut-off events. For 1088357/1088357 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45437 event pairs, 1304 based on Foata normal form. 6/7986 useless extension candidates. Maximal degree in co-relation 72906. Up to 7704 conditions per place. [2024-06-28 03:17:35,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 409 selfloop transitions, 63 changer transitions 0/475 dead transitions. [2024-06-28 03:17:35,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 475 transitions, 7334 flow [2024-06-28 03:17:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:17:35,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-28 03:17:35,876 INFO L175 Difference]: Start difference. First operand has 292 places, 440 transitions, 6041 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:17:35,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 475 transitions, 7334 flow [2024-06-28 03:17:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 475 transitions, 7233 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:38,596 INFO L231 Difference]: Finished difference. Result has 296 places, 444 transitions, 6136 flow [2024-06-28 03:17:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6136, PETRI_PLACES=296, PETRI_TRANSITIONS=444} [2024-06-28 03:17:38,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-28 03:17:38,597 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 444 transitions, 6136 flow [2024-06-28 03:17:38,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:38,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:38,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:38,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:17:38,597 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)] === [2024-06-28 03:17:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1450961861, now seen corresponding path program 4 times [2024-06-28 03:17:38,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:38,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702777179] [2024-06-28 03:17:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:38,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:39,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702777179] [2024-06-28 03:17:39,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702777179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:39,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:39,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513601475] [2024-06-28 03:17:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:39,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:39,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 444 transitions, 6136 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:39,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:39,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:39,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:41,239 INFO L124 PetriNetUnfolderBase]: 5293/7957 cut-off events. [2024-06-28 03:17:41,240 INFO L125 PetriNetUnfolderBase]: For 1092292/1092292 co-relation queries the response was YES. [2024-06-28 03:17:41,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72696 conditions, 7957 events. 5293/7957 cut-off events. For 1092292/1092292 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45300 event pairs, 1313 based on Foata normal form. 6/7962 useless extension candidates. Maximal degree in co-relation 72550. Up to 7693 conditions per place. [2024-06-28 03:17:41,339 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 60 changer transitions 0/470 dead transitions. [2024-06-28 03:17:41,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 470 transitions, 7172 flow [2024-06-28 03:17:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:17:41,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 03:17:41,341 INFO L175 Difference]: Start difference. First operand has 296 places, 444 transitions, 6136 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:17:41,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 470 transitions, 7172 flow [2024-06-28 03:17:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 470 transitions, 6982 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:44,214 INFO L231 Difference]: Finished difference. Result has 297 places, 444 transitions, 6074 flow [2024-06-28 03:17:44,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5946, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6074, PETRI_PLACES=297, PETRI_TRANSITIONS=444} [2024-06-28 03:17:44,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-28 03:17:44,214 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 444 transitions, 6074 flow [2024-06-28 03:17:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:44,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:44,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:17:44,215 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)] === [2024-06-28 03:17:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -710422050, now seen corresponding path program 1 times [2024-06-28 03:17:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439618296] [2024-06-28 03:17:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:45,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439618296] [2024-06-28 03:17:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439618296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741927703] [2024-06-28 03:17:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:45,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:45,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 444 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:45,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:45,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:45,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:47,016 INFO L124 PetriNetUnfolderBase]: 5288/7947 cut-off events. [2024-06-28 03:17:47,016 INFO L125 PetriNetUnfolderBase]: For 1094636/1094636 co-relation queries the response was YES. [2024-06-28 03:17:47,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72621 conditions, 7947 events. 5288/7947 cut-off events. For 1094636/1094636 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45150 event pairs, 1322 based on Foata normal form. 2/7948 useless extension candidates. Maximal degree in co-relation 72474. Up to 7915 conditions per place. [2024-06-28 03:17:47,135 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 16 changer transitions 0/459 dead transitions. [2024-06-28 03:17:47,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 459 transitions, 7054 flow [2024-06-28 03:17:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 03:17:47,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 03:17:47,136 INFO L175 Difference]: Start difference. First operand has 297 places, 444 transitions, 6074 flow. Second operand 8 states and 119 transitions. [2024-06-28 03:17:47,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 459 transitions, 7054 flow [2024-06-28 03:17:49,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 459 transitions, 6895 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:17:49,805 INFO L231 Difference]: Finished difference. Result has 297 places, 446 transitions, 5992 flow [2024-06-28 03:17:49,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5915, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=297, PETRI_TRANSITIONS=446} [2024-06-28 03:17:49,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-28 03:17:49,806 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 446 transitions, 5992 flow [2024-06-28 03:17:49,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:49,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:49,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:49,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:17:49,806 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)] === [2024-06-28 03:17:49,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1796847038, now seen corresponding path program 1 times [2024-06-28 03:17:49,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:49,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076701426] [2024-06-28 03:17:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:49,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076701426] [2024-06-28 03:17:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076701426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2490307] [2024-06-28 03:17:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:50,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:50,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 446 transitions, 5992 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:50,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:50,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:50,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:52,640 INFO L124 PetriNetUnfolderBase]: 5556/8382 cut-off events. [2024-06-28 03:17:52,641 INFO L125 PetriNetUnfolderBase]: For 1237670/1237670 co-relation queries the response was YES. [2024-06-28 03:17:52,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76729 conditions, 8382 events. 5556/8382 cut-off events. For 1237670/1237670 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48298 event pairs, 1045 based on Foata normal form. 22/8403 useless extension candidates. Maximal degree in co-relation 76581. Up to 6388 conditions per place. [2024-06-28 03:17:52,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 341 selfloop transitions, 162 changer transitions 0/506 dead transitions. [2024-06-28 03:17:52,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 506 transitions, 8103 flow [2024-06-28 03:17:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 03:17:52,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-28 03:17:52,762 INFO L175 Difference]: Start difference. First operand has 297 places, 446 transitions, 5992 flow. Second operand 9 states and 183 transitions. [2024-06-28 03:17:52,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 506 transitions, 8103 flow [2024-06-28 03:17:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 506 transitions, 8042 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:56,215 INFO L231 Difference]: Finished difference. Result has 301 places, 456 transitions, 6559 flow [2024-06-28 03:17:56,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6559, PETRI_PLACES=301, PETRI_TRANSITIONS=456} [2024-06-28 03:17:56,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-28 03:17:56,215 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 456 transitions, 6559 flow [2024-06-28 03:17:56,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:56,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:56,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:56,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:17:56,216 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)] === [2024-06-28 03:17:56,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1800514006, now seen corresponding path program 1 times [2024-06-28 03:17:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:56,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963631117] [2024-06-28 03:17:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963631117] [2024-06-28 03:17:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963631117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:57,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405023973] [2024-06-28 03:17:57,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:57,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:57,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:57,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 456 transitions, 6559 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:57,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:57,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:57,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:59,018 INFO L124 PetriNetUnfolderBase]: 5600/8443 cut-off events. [2024-06-28 03:17:59,018 INFO L125 PetriNetUnfolderBase]: For 1223952/1223952 co-relation queries the response was YES. [2024-06-28 03:17:59,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79079 conditions, 8443 events. 5600/8443 cut-off events. For 1223952/1223952 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 48914 event pairs, 1172 based on Foata normal form. 4/8446 useless extension candidates. Maximal degree in co-relation 78929. Up to 7049 conditions per place. [2024-06-28 03:17:59,138 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 385 selfloop transitions, 180 changer transitions 0/568 dead transitions. [2024-06-28 03:17:59,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 568 transitions, 9240 flow [2024-06-28 03:17:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:17:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-28 03:17:59,139 INFO L175 Difference]: Start difference. First operand has 301 places, 456 transitions, 6559 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:17:59,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 568 transitions, 9240 flow [2024-06-28 03:18:01,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 568 transitions, 8969 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:01,394 INFO L231 Difference]: Finished difference. Result has 307 places, 517 transitions, 7737 flow [2024-06-28 03:18:01,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7737, PETRI_PLACES=307, PETRI_TRANSITIONS=517} [2024-06-28 03:18:01,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-28 03:18:01,394 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 517 transitions, 7737 flow [2024-06-28 03:18:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:01,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:01,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:01,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:18:01,395 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)] === [2024-06-28 03:18:01,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1797086048, now seen corresponding path program 2 times [2024-06-28 03:18:01,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:01,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003484952] [2024-06-28 03:18:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:01,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003484952] [2024-06-28 03:18:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003484952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:02,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:02,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983084138] [2024-06-28 03:18:02,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:02,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:02,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 517 transitions, 7737 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:02,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:04,390 INFO L124 PetriNetUnfolderBase]: 5680/8567 cut-off events. [2024-06-28 03:18:04,390 INFO L125 PetriNetUnfolderBase]: For 1327713/1327713 co-relation queries the response was YES. [2024-06-28 03:18:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82829 conditions, 8567 events. 5680/8567 cut-off events. For 1327713/1327713 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49701 event pairs, 1199 based on Foata normal form. 22/8588 useless extension candidates. Maximal degree in co-relation 82675. Up to 7626 conditions per place. [2024-06-28 03:18:04,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 407 selfloop transitions, 153 changer transitions 0/563 dead transitions. [2024-06-28 03:18:04,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 563 transitions, 9643 flow [2024-06-28 03:18:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:18:04,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-28 03:18:04,515 INFO L175 Difference]: Start difference. First operand has 307 places, 517 transitions, 7737 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:18:04,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 563 transitions, 9643 flow [2024-06-28 03:18:07,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 563 transitions, 9520 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-28 03:18:07,229 INFO L231 Difference]: Finished difference. Result has 314 places, 521 transitions, 8052 flow [2024-06-28 03:18:07,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8052, PETRI_PLACES=314, PETRI_TRANSITIONS=521} [2024-06-28 03:18:07,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-28 03:18:07,229 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 521 transitions, 8052 flow [2024-06-28 03:18:07,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:07,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:07,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:07,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:18:07,230 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)] === [2024-06-28 03:18:07,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1800802306, now seen corresponding path program 2 times [2024-06-28 03:18:07,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:07,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295088196] [2024-06-28 03:18:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:07,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:08,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:08,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295088196] [2024-06-28 03:18:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295088196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:08,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:08,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:08,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037283529] [2024-06-28 03:18:08,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:08,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:08,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:08,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:08,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 521 transitions, 8052 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:08,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:08,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:08,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:10,188 INFO L124 PetriNetUnfolderBase]: 5758/8675 cut-off events. [2024-06-28 03:18:10,188 INFO L125 PetriNetUnfolderBase]: For 1319283/1319283 co-relation queries the response was YES. [2024-06-28 03:18:10,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85216 conditions, 8675 events. 5758/8675 cut-off events. For 1319283/1319283 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50455 event pairs, 1183 based on Foata normal form. 4/8678 useless extension candidates. Maximal degree in co-relation 85059. Up to 7569 conditions per place. [2024-06-28 03:18:10,312 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 415 selfloop transitions, 167 changer transitions 0/585 dead transitions. [2024-06-28 03:18:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 585 transitions, 10456 flow [2024-06-28 03:18:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:18:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-28 03:18:10,313 INFO L175 Difference]: Start difference. First operand has 314 places, 521 transitions, 8052 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:18:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 585 transitions, 10456 flow [2024-06-28 03:18:14,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 585 transitions, 10160 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:14,521 INFO L231 Difference]: Finished difference. Result has 319 places, 540 transitions, 8480 flow [2024-06-28 03:18:14,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8480, PETRI_PLACES=319, PETRI_TRANSITIONS=540} [2024-06-28 03:18:14,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-28 03:18:14,522 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 540 transitions, 8480 flow [2024-06-28 03:18:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:14,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:14,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:14,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:18:14,523 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)] === [2024-06-28 03:18:14,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1901311502, now seen corresponding path program 3 times [2024-06-28 03:18:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:14,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681452726] [2024-06-28 03:18:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681452726] [2024-06-28 03:18:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681452726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883333179] [2024-06-28 03:18:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:15,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:15,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 540 transitions, 8480 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:15,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:15,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:15,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:17,613 INFO L124 PetriNetUnfolderBase]: 5748/8662 cut-off events. [2024-06-28 03:18:17,613 INFO L125 PetriNetUnfolderBase]: For 1331601/1331601 co-relation queries the response was YES. [2024-06-28 03:18:17,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85031 conditions, 8662 events. 5748/8662 cut-off events. For 1331601/1331601 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50435 event pairs, 1192 based on Foata normal form. 4/8665 useless extension candidates. Maximal degree in co-relation 84871. Up to 7597 conditions per place. [2024-06-28 03:18:17,729 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 156 changer transitions 0/585 dead transitions. [2024-06-28 03:18:17,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 585 transitions, 10564 flow [2024-06-28 03:18:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:18:17,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:18:17,731 INFO L175 Difference]: Start difference. First operand has 319 places, 540 transitions, 8480 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:18:17,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 585 transitions, 10564 flow [2024-06-28 03:18:22,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 585 transitions, 10189 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:22,259 INFO L231 Difference]: Finished difference. Result has 324 places, 541 transitions, 8456 flow [2024-06-28 03:18:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8456, PETRI_PLACES=324, PETRI_TRANSITIONS=541} [2024-06-28 03:18:22,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-28 03:18:22,259 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 541 transitions, 8456 flow [2024-06-28 03:18:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:22,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:22,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:22,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:18:22,260 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)] === [2024-06-28 03:18:22,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1805417918, now seen corresponding path program 3 times [2024-06-28 03:18:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258144878] [2024-06-28 03:18:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:23,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:23,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258144878] [2024-06-28 03:18:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258144878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:23,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:23,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86138144] [2024-06-28 03:18:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:23,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:23,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 541 transitions, 8456 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-28 03:18:23,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:23,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:23,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:25,453 INFO L124 PetriNetUnfolderBase]: 5828/8785 cut-off events. [2024-06-28 03:18:25,454 INFO L125 PetriNetUnfolderBase]: For 1433562/1433564 co-relation queries the response was YES. [2024-06-28 03:18:25,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86883 conditions, 8785 events. 5828/8785 cut-off events. For 1433562/1433564 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 51227 event pairs, 1221 based on Foata normal form. 24/8808 useless extension candidates. Maximal degree in co-relation 86721. Up to 8108 conditions per place. [2024-06-28 03:18:25,584 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 469 selfloop transitions, 107 changer transitions 0/579 dead transitions. [2024-06-28 03:18:25,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 579 transitions, 9885 flow [2024-06-28 03:18:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:18:25,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-28 03:18:25,585 INFO L175 Difference]: Start difference. First operand has 324 places, 541 transitions, 8456 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:18:25,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 579 transitions, 9885 flow [2024-06-28 03:18:29,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 579 transitions, 9534 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:29,415 INFO L231 Difference]: Finished difference. Result has 327 places, 545 transitions, 8461 flow [2024-06-28 03:18:29,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8461, PETRI_PLACES=327, PETRI_TRANSITIONS=545} [2024-06-28 03:18:29,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-28 03:18:29,416 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 545 transitions, 8461 flow [2024-06-28 03:18:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-28 03:18:29,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:29,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:18:29,416 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)] === [2024-06-28 03:18:29,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1915297046, now seen corresponding path program 1 times [2024-06-28 03:18:29,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:29,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431163410] [2024-06-28 03:18:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:30,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431163410] [2024-06-28 03:18:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431163410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:30,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:30,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:30,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833987649] [2024-06-28 03:18:30,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:30,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:30,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:30,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 545 transitions, 8461 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:30,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:30,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:32,465 INFO L124 PetriNetUnfolderBase]: 6761/10102 cut-off events. [2024-06-28 03:18:32,466 INFO L125 PetriNetUnfolderBase]: For 1652751/1652753 co-relation queries the response was YES. [2024-06-28 03:18:32,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101647 conditions, 10102 events. 6761/10102 cut-off events. For 1652751/1652753 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59094 event pairs, 1541 based on Foata normal form. 20/10121 useless extension candidates. Maximal degree in co-relation 101484. Up to 8344 conditions per place. [2024-06-28 03:18:32,612 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 526 selfloop transitions, 169 changer transitions 0/698 dead transitions. [2024-06-28 03:18:32,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 698 transitions, 12560 flow [2024-06-28 03:18:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:18:32,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-28 03:18:32,613 INFO L175 Difference]: Start difference. First operand has 327 places, 545 transitions, 8461 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:18:32,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 698 transitions, 12560 flow [2024-06-28 03:18:37,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 698 transitions, 12230 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:37,955 INFO L231 Difference]: Finished difference. Result has 333 places, 635 transitions, 10527 flow [2024-06-28 03:18:37,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10527, PETRI_PLACES=333, PETRI_TRANSITIONS=635} [2024-06-28 03:18:37,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-28 03:18:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 635 transitions, 10527 flow [2024-06-28 03:18:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:37,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:37,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:18:37,956 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)] === [2024-06-28 03:18:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2092665716, now seen corresponding path program 2 times [2024-06-28 03:18:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228376529] [2024-06-28 03:18:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:38,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:38,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228376529] [2024-06-28 03:18:38,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228376529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:38,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:38,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430569723] [2024-06-28 03:18:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:38,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:38,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:38,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:38,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:38,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:38,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 635 transitions, 10527 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:38,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:38,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:38,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:41,397 INFO L124 PetriNetUnfolderBase]: 6821/10185 cut-off events. [2024-06-28 03:18:41,397 INFO L125 PetriNetUnfolderBase]: For 1667614/1667616 co-relation queries the response was YES. [2024-06-28 03:18:41,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104218 conditions, 10185 events. 6821/10185 cut-off events. For 1667614/1667616 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 59625 event pairs, 1359 based on Foata normal form. 14/10198 useless extension candidates. Maximal degree in co-relation 104050. Up to 7666 conditions per place. [2024-06-28 03:18:41,575 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 440 selfloop transitions, 233 changer transitions 0/676 dead transitions. [2024-06-28 03:18:41,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 676 transitions, 12635 flow [2024-06-28 03:18:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:18:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:18:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:18:41,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:18:41,576 INFO L175 Difference]: Start difference. First operand has 333 places, 635 transitions, 10527 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:18:41,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 676 transitions, 12635 flow [2024-06-28 03:18:46,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 676 transitions, 12527 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-28 03:18:46,669 INFO L231 Difference]: Finished difference. Result has 340 places, 646 transitions, 11191 flow [2024-06-28 03:18:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10425, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11191, PETRI_PLACES=340, PETRI_TRANSITIONS=646} [2024-06-28 03:18:46,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-28 03:18:46,670 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 646 transitions, 11191 flow [2024-06-28 03:18:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:46,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:18:46,671 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)] === [2024-06-28 03:18:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1919938676, now seen corresponding path program 3 times [2024-06-28 03:18:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:46,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713214306] [2024-06-28 03:18:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:47,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713214306] [2024-06-28 03:18:47,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713214306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:47,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:47,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:47,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489599983] [2024-06-28 03:18:47,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:47,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:47,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:47,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:47,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 646 transitions, 11191 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:18:47,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:47,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:47,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:51,106 INFO L124 PetriNetUnfolderBase]: 6803/10162 cut-off events. [2024-06-28 03:18:51,106 INFO L125 PetriNetUnfolderBase]: For 1658352/1658354 co-relation queries the response was YES. [2024-06-28 03:18:51,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105081 conditions, 10162 events. 6803/10162 cut-off events. For 1658352/1658354 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 59450 event pairs, 1523 based on Foata normal form. 8/10169 useless extension candidates. Maximal degree in co-relation 104910. Up to 8391 conditions per place. [2024-06-28 03:18:51,362 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 530 selfloop transitions, 173 changer transitions 0/706 dead transitions. [2024-06-28 03:18:51,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 706 transitions, 13652 flow [2024-06-28 03:18:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:18:51,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 03:18:51,376 INFO L175 Difference]: Start difference. First operand has 340 places, 646 transitions, 11191 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:18:51,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 706 transitions, 13652 flow [2024-06-28 03:18:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 706 transitions, 13276 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-28 03:18:56,707 INFO L231 Difference]: Finished difference. Result has 348 places, 661 transitions, 11613 flow [2024-06-28 03:18:56,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11613, PETRI_PLACES=348, PETRI_TRANSITIONS=661} [2024-06-28 03:18:56,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-28 03:18:56,708 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 661 transitions, 11613 flow [2024-06-28 03:18:56,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-28 03:18:56,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:56,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:18:56,709 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)] === [2024-06-28 03:18:56,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2092661748, now seen corresponding path program 4 times [2024-06-28 03:18:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197436046] [2024-06-28 03:18:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197436046] [2024-06-28 03:18:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197436046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258687265] [2024-06-28 03:18:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:57,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:57,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:57,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 661 transitions, 11613 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-28 03:18:57,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:57,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:57,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:01,216 INFO L124 PetriNetUnfolderBase]: 6881/10272 cut-off events. [2024-06-28 03:19:01,216 INFO L125 PetriNetUnfolderBase]: For 1724145/1724147 co-relation queries the response was YES. [2024-06-28 03:19:01,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106644 conditions, 10272 events. 6881/10272 cut-off events. For 1724145/1724147 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60216 event pairs, 1346 based on Foata normal form. 14/10285 useless extension candidates. Maximal degree in co-relation 106469. Up to 7674 conditions per place. [2024-06-28 03:19:01,501 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 446 selfloop transitions, 255 changer transitions 0/704 dead transitions. [2024-06-28 03:19:01,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 704 transitions, 13692 flow [2024-06-28 03:19:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:19:01,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 03:19:01,505 INFO L175 Difference]: Start difference. First operand has 348 places, 661 transitions, 11613 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:19:01,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 704 transitions, 13692 flow [2024-06-28 03:19:05,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 704 transitions, 13596 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:19:05,722 INFO L231 Difference]: Finished difference. Result has 354 places, 670 transitions, 12222 flow [2024-06-28 03:19:05,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12222, PETRI_PLACES=354, PETRI_TRANSITIONS=670} [2024-06-28 03:19:05,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-28 03:19:05,722 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 670 transitions, 12222 flow [2024-06-28 03:19:05,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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) [2024-06-28 03:19:05,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:05,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:05,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:19:05,723 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)] === [2024-06-28 03:19:05,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2092315788, now seen corresponding path program 5 times [2024-06-28 03:19:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:05,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016101223] [2024-06-28 03:19:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:05,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:06,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016101223] [2024-06-28 03:19:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016101223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:06,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:06,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071010587] [2024-06-28 03:19:06,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:06,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:06,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 670 transitions, 12222 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:06,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:06,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:10,412 INFO L124 PetriNetUnfolderBase]: 6941/10356 cut-off events. [2024-06-28 03:19:10,412 INFO L125 PetriNetUnfolderBase]: For 1771099/1771101 co-relation queries the response was YES. [2024-06-28 03:19:10,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110104 conditions, 10356 events. 6941/10356 cut-off events. For 1771099/1771101 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60722 event pairs, 1343 based on Foata normal form. 14/10369 useless extension candidates. Maximal degree in co-relation 109927. Up to 7782 conditions per place. [2024-06-28 03:19:10,565 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 451 selfloop transitions, 260 changer transitions 0/714 dead transitions. [2024-06-28 03:19:10,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 714 transitions, 14345 flow [2024-06-28 03:19:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:19:10,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-28 03:19:10,567 INFO L175 Difference]: Start difference. First operand has 354 places, 670 transitions, 12222 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:19:10,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 714 transitions, 14345 flow [2024-06-28 03:19:17,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 714 transitions, 13748 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:17,567 INFO L231 Difference]: Finished difference. Result has 357 places, 679 transitions, 12358 flow [2024-06-28 03:19:17,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11625, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12358, PETRI_PLACES=357, PETRI_TRANSITIONS=679} [2024-06-28 03:19:17,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-28 03:19:17,567 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 679 transitions, 12358 flow [2024-06-28 03:19:17,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:17,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:17,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:17,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:19:17,568 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)] === [2024-06-28 03:19:17,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2092305248, now seen corresponding path program 4 times [2024-06-28 03:19:17,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:17,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704225564] [2024-06-28 03:19:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:17,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704225564] [2024-06-28 03:19:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704225564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:18,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:18,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545308448] [2024-06-28 03:19:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:18,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:18,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 679 transitions, 12358 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:18,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:18,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:18,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:22,182 INFO L124 PetriNetUnfolderBase]: 7074/10560 cut-off events. [2024-06-28 03:19:22,182 INFO L125 PetriNetUnfolderBase]: For 1871640/1871640 co-relation queries the response was YES. [2024-06-28 03:19:22,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113338 conditions, 10560 events. 7074/10560 cut-off events. For 1871640/1871640 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62022 event pairs, 1553 based on Foata normal form. 23/10582 useless extension candidates. Maximal degree in co-relation 113160. Up to 9793 conditions per place. [2024-06-28 03:19:22,338 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 599 selfloop transitions, 132 changer transitions 0/734 dead transitions. [2024-06-28 03:19:22,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 734 transitions, 15067 flow [2024-06-28 03:19:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:19:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:19:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 03:19:22,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-28 03:19:22,339 INFO L175 Difference]: Start difference. First operand has 357 places, 679 transitions, 12358 flow. Second operand 10 states and 171 transitions. [2024-06-28 03:19:22,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 734 transitions, 15067 flow [2024-06-28 03:19:28,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 734 transitions, 14270 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-28 03:19:28,705 INFO L231 Difference]: Finished difference. Result has 363 places, 704 transitions, 12538 flow [2024-06-28 03:19:28,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11565, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12538, PETRI_PLACES=363, PETRI_TRANSITIONS=704} [2024-06-28 03:19:28,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-28 03:19:28,706 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 704 transitions, 12538 flow [2024-06-28 03:19:28,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:28,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:28,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:19:28,706 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)] === [2024-06-28 03:19:28,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2092305558, now seen corresponding path program 6 times [2024-06-28 03:19:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411501384] [2024-06-28 03:19:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:29,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:29,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411501384] [2024-06-28 03:19:29,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411501384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:29,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:29,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:29,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669672238] [2024-06-28 03:19:29,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:29,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:29,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:29,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 704 transitions, 12538 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:29,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:29,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:29,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:33,298 INFO L124 PetriNetUnfolderBase]: 7094/10586 cut-off events. [2024-06-28 03:19:33,298 INFO L125 PetriNetUnfolderBase]: For 1843681/1843683 co-relation queries the response was YES. [2024-06-28 03:19:33,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113373 conditions, 10586 events. 7094/10586 cut-off events. For 1843681/1843683 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 62263 event pairs, 1359 based on Foata normal form. 6/10591 useless extension candidates. Maximal degree in co-relation 113190. Up to 7864 conditions per place. [2024-06-28 03:19:33,486 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 458 selfloop transitions, 286 changer transitions 0/747 dead transitions. [2024-06-28 03:19:33,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 747 transitions, 14685 flow [2024-06-28 03:19:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:19:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:19:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:19:33,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-28 03:19:33,487 INFO L175 Difference]: Start difference. First operand has 363 places, 704 transitions, 12538 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:19:33,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 747 transitions, 14685 flow [2024-06-28 03:19:40,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 747 transitions, 14470 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 03:19:40,869 INFO L231 Difference]: Finished difference. Result has 369 places, 709 transitions, 13043 flow [2024-06-28 03:19:40,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12323, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13043, PETRI_PLACES=369, PETRI_TRANSITIONS=709} [2024-06-28 03:19:40,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-28 03:19:40,870 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 709 transitions, 13043 flow [2024-06-28 03:19:40,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:40,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:40,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:40,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:19:40,871 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)] === [2024-06-28 03:19:40,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1064886522, now seen corresponding path program 4 times [2024-06-28 03:19:40,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:40,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113705766] [2024-06-28 03:19:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:41,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:41,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113705766] [2024-06-28 03:19:41,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113705766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:41,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:41,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402873171] [2024-06-28 03:19:41,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:41,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:41,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 709 transitions, 13043 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:19:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:44,901 INFO L124 PetriNetUnfolderBase]: 7049/10521 cut-off events. [2024-06-28 03:19:44,901 INFO L125 PetriNetUnfolderBase]: For 1862396/1862396 co-relation queries the response was YES. [2024-06-28 03:19:45,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113081 conditions, 10521 events. 7049/10521 cut-off events. For 1862396/1862396 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61908 event pairs, 1682 based on Foata normal form. 9/10529 useless extension candidates. Maximal degree in co-relation 112898. Up to 10032 conditions per place. [2024-06-28 03:19:45,066 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 653 selfloop transitions, 82 changer transitions 0/738 dead transitions. [2024-06-28 03:19:45,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 738 transitions, 14971 flow [2024-06-28 03:19:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:19:45,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:19:45,067 INFO L175 Difference]: Start difference. First operand has 369 places, 709 transitions, 13043 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:19:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 738 transitions, 14971 flow [2024-06-28 03:19:51,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 738 transitions, 14321 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-28 03:19:51,936 INFO L231 Difference]: Finished difference. Result has 370 places, 713 transitions, 12774 flow [2024-06-28 03:19:51,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12774, PETRI_PLACES=370, PETRI_TRANSITIONS=713} [2024-06-28 03:19:51,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-28 03:19:51,937 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 713 transitions, 12774 flow [2024-06-28 03:19:51,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:19:51,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:51,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:19:51,937 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)] === [2024-06-28 03:19:51,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 790557720, now seen corresponding path program 5 times [2024-06-28 03:19:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:51,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707007802] [2024-06-28 03:19:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707007802] [2024-06-28 03:19:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707007802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:52,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:52,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:52,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452042327] [2024-06-28 03:19:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:52,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:52,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:52,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:52,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 713 transitions, 12774 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:19:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:52,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:52,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:55,993 INFO L124 PetriNetUnfolderBase]: 7034/10502 cut-off events. [2024-06-28 03:19:55,993 INFO L125 PetriNetUnfolderBase]: For 1859605/1859605 co-relation queries the response was YES. [2024-06-28 03:19:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111555 conditions, 10502 events. 7034/10502 cut-off events. For 1859605/1859605 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61728 event pairs, 1728 based on Foata normal form. 9/10510 useless extension candidates. Maximal degree in co-relation 111370. Up to 10363 conditions per place. [2024-06-28 03:19:56,150 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 685 selfloop transitions, 45 changer transitions 0/733 dead transitions. [2024-06-28 03:19:56,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 733 transitions, 14407 flow [2024-06-28 03:19:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:19:56,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:19:56,151 INFO L175 Difference]: Start difference. First operand has 370 places, 713 transitions, 12774 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:19:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 733 transitions, 14407 flow [2024-06-28 03:20:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 733 transitions, 14222 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:03,230 INFO L231 Difference]: Finished difference. Result has 374 places, 718 transitions, 12821 flow [2024-06-28 03:20:03,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12605, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12821, PETRI_PLACES=374, PETRI_TRANSITIONS=718} [2024-06-28 03:20:03,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-28 03:20:03,231 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 718 transitions, 12821 flow [2024-06-28 03:20:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:03,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:03,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:03,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:20:03,231 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)] === [2024-06-28 03:20:03,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 790142010, now seen corresponding path program 6 times [2024-06-28 03:20:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:03,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281300514] [2024-06-28 03:20:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281300514] [2024-06-28 03:20:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281300514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:03,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:03,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:03,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419191405] [2024-06-28 03:20:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:04,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:04,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 718 transitions, 12821 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:04,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:04,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:07,351 INFO L124 PetriNetUnfolderBase]: 7019/10481 cut-off events. [2024-06-28 03:20:07,351 INFO L125 PetriNetUnfolderBase]: For 1860719/1860719 co-relation queries the response was YES. [2024-06-28 03:20:07,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110598 conditions, 10481 events. 7019/10481 cut-off events. For 1860719/1860719 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61676 event pairs, 1699 based on Foata normal form. 9/10489 useless extension candidates. Maximal degree in co-relation 110413. Up to 10285 conditions per place. [2024-06-28 03:20:07,517 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 681 selfloop transitions, 56 changer transitions 0/740 dead transitions. [2024-06-28 03:20:07,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 740 transitions, 14453 flow [2024-06-28 03:20:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:20:07,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 03:20:07,518 INFO L175 Difference]: Start difference. First operand has 374 places, 718 transitions, 12821 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:20:07,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 740 transitions, 14453 flow [2024-06-28 03:20:15,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 740 transitions, 14338 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:15,702 INFO L231 Difference]: Finished difference. Result has 378 places, 722 transitions, 12930 flow [2024-06-28 03:20:15,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12930, PETRI_PLACES=378, PETRI_TRANSITIONS=722} [2024-06-28 03:20:15,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-28 03:20:15,702 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 722 transitions, 12930 flow [2024-06-28 03:20:15,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:15,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:15,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:15,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:20:15,703 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)] === [2024-06-28 03:20:15,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash -615718858, now seen corresponding path program 7 times [2024-06-28 03:20:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:15,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026906261] [2024-06-28 03:20:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:16,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:16,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026906261] [2024-06-28 03:20:16,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026906261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:16,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:16,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735527962] [2024-06-28 03:20:16,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:16,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:16,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:16,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 722 transitions, 12930 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:16,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:16,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:16,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:19,637 INFO L124 PetriNetUnfolderBase]: 7049/10523 cut-off events. [2024-06-28 03:20:19,637 INFO L125 PetriNetUnfolderBase]: For 1879093/1879095 co-relation queries the response was YES. [2024-06-28 03:20:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111329 conditions, 10523 events. 7049/10523 cut-off events. For 1879093/1879095 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61871 event pairs, 1688 based on Foata normal form. 8/10530 useless extension candidates. Maximal degree in co-relation 111143. Up to 9943 conditions per place. [2024-06-28 03:20:19,800 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 645 selfloop transitions, 102 changer transitions 0/750 dead transitions. [2024-06-28 03:20:19,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 750 transitions, 15076 flow [2024-06-28 03:20:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:20:19,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 03:20:19,801 INFO L175 Difference]: Start difference. First operand has 378 places, 722 transitions, 12930 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:20:19,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 750 transitions, 15076 flow [2024-06-28 03:20:27,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 750 transitions, 14951 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:27,053 INFO L231 Difference]: Finished difference. Result has 381 places, 728 transitions, 13182 flow [2024-06-28 03:20:27,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12805, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13182, PETRI_PLACES=381, PETRI_TRANSITIONS=728} [2024-06-28 03:20:27,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-28 03:20:27,054 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 728 transitions, 13182 flow [2024-06-28 03:20:27,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:27,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:27,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:20:27,055 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)] === [2024-06-28 03:20:27,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash 601238136, now seen corresponding path program 8 times [2024-06-28 03:20:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512236552] [2024-06-28 03:20:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512236552] [2024-06-28 03:20:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512236552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:27,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:27,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:27,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810506274] [2024-06-28 03:20:27,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:27,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:27,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:27,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 728 transitions, 13182 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:27,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:31,024 INFO L124 PetriNetUnfolderBase]: 7064/10544 cut-off events. [2024-06-28 03:20:31,024 INFO L125 PetriNetUnfolderBase]: For 1898813/1898815 co-relation queries the response was YES. [2024-06-28 03:20:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112044 conditions, 10544 events. 7064/10544 cut-off events. For 1898813/1898815 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 62021 event pairs, 1716 based on Foata normal form. 5/10548 useless extension candidates. Maximal degree in co-relation 111857. Up to 10427 conditions per place. [2024-06-28 03:20:31,207 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 696 selfloop transitions, 46 changer transitions 0/745 dead transitions. [2024-06-28 03:20:31,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 745 transitions, 14826 flow [2024-06-28 03:20:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:20:31,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:20:31,209 INFO L175 Difference]: Start difference. First operand has 381 places, 728 transitions, 13182 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:20:31,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 745 transitions, 14826 flow [2024-06-28 03:20:38,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 745 transitions, 14600 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:38,774 INFO L231 Difference]: Finished difference. Result has 384 places, 733 transitions, 13187 flow [2024-06-28 03:20:38,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12962, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13187, PETRI_PLACES=384, PETRI_TRANSITIONS=733} [2024-06-28 03:20:38,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-28 03:20:38,775 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 733 transitions, 13187 flow [2024-06-28 03:20:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:38,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:38,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:38,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:20:38,776 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)] === [2024-06-28 03:20:38,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 823425366, now seen corresponding path program 9 times [2024-06-28 03:20:38,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:38,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400680574] [2024-06-28 03:20:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:39,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400680574] [2024-06-28 03:20:39,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400680574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:39,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:39,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842774864] [2024-06-28 03:20:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:39,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:39,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 733 transitions, 13187 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:39,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:39,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:39,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:42,888 INFO L124 PetriNetUnfolderBase]: 7046/10520 cut-off events. [2024-06-28 03:20:42,888 INFO L125 PetriNetUnfolderBase]: For 1915072/1915074 co-relation queries the response was YES. [2024-06-28 03:20:43,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111128 conditions, 10520 events. 7046/10520 cut-off events. For 1915072/1915074 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 61818 event pairs, 1704 based on Foata normal form. 8/10527 useless extension candidates. Maximal degree in co-relation 110940. Up to 10242 conditions per place. [2024-06-28 03:20:43,062 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 681 selfloop transitions, 67 changer transitions 0/751 dead transitions. [2024-06-28 03:20:43,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 751 transitions, 14973 flow [2024-06-28 03:20:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:20:43,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:20:43,063 INFO L175 Difference]: Start difference. First operand has 384 places, 733 transitions, 13187 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:20:43,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 751 transitions, 14973 flow [2024-06-28 03:20:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 751 transitions, 14850 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:51,360 INFO L231 Difference]: Finished difference. Result has 388 places, 734 transitions, 13229 flow [2024-06-28 03:20:51,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13064, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13229, PETRI_PLACES=388, PETRI_TRANSITIONS=734} [2024-06-28 03:20:51,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-28 03:20:51,361 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 734 transitions, 13229 flow [2024-06-28 03:20:51,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:51,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:51,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:51,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:20:51,361 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)] === [2024-06-28 03:20:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -556842250, now seen corresponding path program 10 times [2024-06-28 03:20:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:51,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706816616] [2024-06-28 03:20:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:51,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:52,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:52,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706816616] [2024-06-28 03:20:52,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706816616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:52,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:52,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:52,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158204516] [2024-06-28 03:20:52,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:52,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:52,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:52,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:52,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 734 transitions, 13229 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:20:52,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:52,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:52,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:55,545 INFO L124 PetriNetUnfolderBase]: 7031/10499 cut-off events. [2024-06-28 03:20:55,545 INFO L125 PetriNetUnfolderBase]: For 1915938/1915940 co-relation queries the response was YES. [2024-06-28 03:20:55,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111025 conditions, 10499 events. 7031/10499 cut-off events. For 1915938/1915940 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61737 event pairs, 1713 based on Foata normal form. 5/10503 useless extension candidates. Maximal degree in co-relation 110836. Up to 10382 conditions per place. [2024-06-28 03:20:55,747 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 695 selfloop transitions, 48 changer transitions 0/746 dead transitions. [2024-06-28 03:20:55,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 746 transitions, 14751 flow [2024-06-28 03:20:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:20:55,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:20:55,748 INFO L175 Difference]: Start difference. First operand has 388 places, 734 transitions, 13229 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:20:55,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 746 transitions, 14751 flow [2024-06-28 03:21:04,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 746 transitions, 14546 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:04,640 INFO L231 Difference]: Finished difference. Result has 391 places, 734 transitions, 13127 flow [2024-06-28 03:21:04,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13024, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13127, PETRI_PLACES=391, PETRI_TRANSITIONS=734} [2024-06-28 03:21:04,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-28 03:21:04,641 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 734 transitions, 13127 flow [2024-06-28 03:21:04,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:21:04,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:04,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:04,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:21:04,641 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)] === [2024-06-28 03:21:04,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -962290630, now seen corresponding path program 11 times [2024-06-28 03:21:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134269523] [2024-06-28 03:21:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:04,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:05,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134269523] [2024-06-28 03:21:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134269523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:05,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067190654] [2024-06-28 03:21:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:05,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 734 transitions, 13127 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:21:05,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:05,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:05,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand