./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_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.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix011_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix011_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-76401ed-m [2024-06-20 15:49:36,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:49:36,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:49:36,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:49:36,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:49:36,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:49:36,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:49:36,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:49:36,871 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:49:36,871 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:49:36,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:49:36,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:49:36,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:49:36,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:49:36,873 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:49:36,873 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:49:36,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:49:36,873 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:49:36,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:49:36,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:49:36,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:49:36,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:49:36,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:49:36,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:49:36,876 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:49:36,876 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:49:36,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:49:36,877 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:49:36,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:49:36,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:49:36,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:49:36,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:49:36,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:49:36,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:49:36,879 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:49:36,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:49:36,879 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:49:36,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:49:36,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:49:36,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:49:36,880 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:49:36,880 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:49:36,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:49:36,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:49:37,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:49:37,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:49:37,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:49:37,141 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:49:37,141 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:49:37,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 15:49:38,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:49:38,408 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:49:38,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 15:49:38,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f081cdecf/dbdb2eb276dd4eb7b2ee7538059b56ec/FLAGe6dac9921 [2024-06-20 15:49:38,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f081cdecf/dbdb2eb276dd4eb7b2ee7538059b56ec [2024-06-20 15:49:38,435 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:49:38,436 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:49:38,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 15:49:38,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:49:38,598 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:49:38,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:49:38,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:49:38,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:49:38,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:49:38" (1/2) ... [2024-06-20 15:49:38,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366ed0fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:49:38, skipping insertion in model container [2024-06-20 15:49:38,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:49:38" (1/2) ... [2024-06-20 15:49:38,655 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e3c3ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:49:38, skipping insertion in model container [2024-06-20 15:49:38,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:49:38" (2/2) ... [2024-06-20 15:49:38,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366ed0fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:38, skipping insertion in model container [2024-06-20 15:49:38,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:49:38" (2/2) ... [2024-06-20 15:49:38,656 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:49:38,733 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:49:38,734 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:49:38,734 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:49:38,734 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-20 15:49:38,734 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:49:38,734 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-20 15:49:38,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:49:39,090 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:49:39,097 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:49:39,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:49:39,268 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:49:39,269 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39 WrapperNode [2024-06-20 15:49:39,270 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:49:39,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:49:39,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:49:39,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:49:39,279 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 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,310 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 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,338 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-20 15:49:39,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:49:39,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:49:39,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:49:39,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:49:39,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,369 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]. [2024-06-20 15:49:39,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:49:39,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:49:39,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:49:39,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:49:39,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (1/1) ... [2024-06-20 15:49:39,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:49:39,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:49:39,424 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) [2024-06-20 15:49:39,462 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 [2024-06-20 15:49:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:49:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:49:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:49:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:49:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:49:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:49:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:49:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:49:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:49:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:49:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:49:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:49:39,482 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:49:39,611 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:49:39,614 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:49:39,960 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:49:39,961 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:49:40,090 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:49:40,090 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:49:40,090 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:49:40 BoogieIcfgContainer [2024-06-20 15:49:40,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:49:40,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:49:40,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:49:40,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:49:40,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:49:38" (1/4) ... [2024-06-20 15:49:40,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba394de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:49:40, skipping insertion in model container [2024-06-20 15:49:40,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:49:38" (2/4) ... [2024-06-20 15:49:40,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba394de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:49:40, skipping insertion in model container [2024-06-20 15:49:40,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:49:39" (3/4) ... [2024-06-20 15:49:40,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba394de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:49:40, skipping insertion in model container [2024-06-20 15:49:40,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:49:40" (4/4) ... [2024-06-20 15:49:40,098 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 15:49:40,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:49:40,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:49:40,112 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:49:40,143 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:49:40,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:49:40,196 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 15:49:40,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:49:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:49:40,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:49:40,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 15:49:40,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:49:40,220 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;@345fc32a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:49:40,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:49:40,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:49:40,225 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:49:40,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:49:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:40,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:49:40,226 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)] === [2024-06-20 15:49:40,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash 383652908, now seen corresponding path program 1 times [2024-06-20 15:49:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305952421] [2024-06-20 15:49:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:40,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:41,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:41,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305952421] [2024-06-20 15:49:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305952421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:41,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:41,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:49:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035013553] [2024-06-20 15:49:41,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:41,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:49:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:49:41,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:49:41,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:49:41,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:41,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:41,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:49:41,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:42,041 INFO L124 PetriNetUnfolderBase]: 1659/2585 cut-off events. [2024-06-20 15:49:42,041 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 15:49:42,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2585 events. 1659/2585 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12998 event pairs, 1184 based on Foata normal form. 1/2520 useless extension candidates. Maximal degree in co-relation 5137. Up to 2465 conditions per place. [2024-06-20 15:49:42,055 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 15:49:42,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-20 15:49:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:49:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:49:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-20 15:49:42,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-20 15:49:42,065 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-20 15:49:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-20 15:49:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:49:42,069 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 15:49:42,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 15:49:42,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 15:49:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 15:49:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:42,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:42,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:42,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:49:42,073 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)] === [2024-06-20 15:49:42,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash -675957289, now seen corresponding path program 1 times [2024-06-20 15:49:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529487802] [2024-06-20 15:49:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529487802] [2024-06-20 15:49:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529487802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:49:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769517027] [2024-06-20 15:49:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:42,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:49:42,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:49:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:49:42,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:49:42,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:42,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:42,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:49:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:43,113 INFO L124 PetriNetUnfolderBase]: 1653/2576 cut-off events. [2024-06-20 15:49:43,113 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-20 15:49:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5765 conditions, 2576 events. 1653/2576 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13013 event pairs, 1038 based on Foata normal form. 3/2553 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-20 15:49:43,124 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 15:49:43,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-20 15:49:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:49:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:49:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:49:43,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-20 15:49:43,126 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:49:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-20 15:49:43,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:49:43,127 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-20 15:49:43,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-20 15:49:43,128 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-20 15:49:43,128 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-20 15:49:43,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:43,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:43,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:43,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:49:43,129 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)] === [2024-06-20 15:49:43,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 520161707, now seen corresponding path program 1 times [2024-06-20 15:49:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:43,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573448713] [2024-06-20 15:49:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:44,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573448713] [2024-06-20 15:49:44,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573448713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:44,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:44,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:49:44,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277025596] [2024-06-20 15:49:44,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:44,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:49:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:49:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:49:44,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:49:44,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:44,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:44,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:49:44,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:44,527 INFO L124 PetriNetUnfolderBase]: 1661/2602 cut-off events. [2024-06-20 15:49:44,528 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-06-20 15:49:44,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6428 conditions, 2602 events. 1661/2602 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13228 event pairs, 812 based on Foata normal form. 5/2584 useless extension candidates. Maximal degree in co-relation 6414. Up to 2387 conditions per place. [2024-06-20 15:49:44,539 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-20 15:49:44,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-20 15:49:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:49:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:49:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 15:49:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-20 15:49:44,541 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-20 15:49:44,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-20 15:49:44,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:49:44,544 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-20 15:49:44,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-20 15:49:44,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-20 15:49:44,545 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-20 15:49:44,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:44,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:44,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:44,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:49:44,545 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)] === [2024-06-20 15:49:44,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1775201430, now seen corresponding path program 1 times [2024-06-20 15:49:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:44,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564589715] [2024-06-20 15:49:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:45,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:45,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564589715] [2024-06-20 15:49:45,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564589715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:45,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:45,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:49:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648088093] [2024-06-20 15:49:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:49:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:49:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:49:45,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:49:45,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-20 15:49:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:45,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:49:45,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:46,336 INFO L124 PetriNetUnfolderBase]: 1669/2614 cut-off events. [2024-06-20 15:49:46,337 INFO L125 PetriNetUnfolderBase]: For 3185/3188 co-relation queries the response was YES. [2024-06-20 15:49:46,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7547 conditions, 2614 events. 1669/2614 cut-off events. For 3185/3188 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13261 event pairs, 666 based on Foata normal form. 7/2598 useless extension candidates. Maximal degree in co-relation 7530. Up to 2373 conditions per place. [2024-06-20 15:49:46,351 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 60 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-20 15:49:46,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 525 flow [2024-06-20 15:49:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:49:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:49:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:49:46,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2024-06-20 15:49:46,353 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:49:46,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 525 flow [2024-06-20 15:49:46,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 15:49:46,357 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 312 flow [2024-06-20 15:49:46,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-20 15:49:46,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-20 15:49:46,358 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 312 flow [2024-06-20 15:49:46,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-20 15:49:46,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:46,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:49:46,358 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)] === [2024-06-20 15:49:46,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 803331766, now seen corresponding path program 1 times [2024-06-20 15:49:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39290854] [2024-06-20 15:49:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:47,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:47,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39290854] [2024-06-20 15:49:47,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39290854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:47,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:47,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:49:47,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415394725] [2024-06-20 15:49:47,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:47,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:49:47,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:49:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:49:47,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:49:47,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:47,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:47,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:49:47,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:48,301 INFO L124 PetriNetUnfolderBase]: 1681/2634 cut-off events. [2024-06-20 15:49:48,301 INFO L125 PetriNetUnfolderBase]: For 5035/5038 co-relation queries the response was YES. [2024-06-20 15:49:48,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8418 conditions, 2634 events. 1681/2634 cut-off events. For 5035/5038 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13365 event pairs, 502 based on Foata normal form. 12/2623 useless extension candidates. Maximal degree in co-relation 8398. Up to 2341 conditions per place. [2024-06-20 15:49:48,318 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-20 15:49:48,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 626 flow [2024-06-20 15:49:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:49:48,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-20 15:49:48,320 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 312 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:49:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 626 flow [2024-06-20 15:49:48,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:48,324 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-20 15:49:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-20 15:49:48,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-20 15:49:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-20 15:49:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:49:48,326 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)] === [2024-06-20 15:49:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 139442829, now seen corresponding path program 1 times [2024-06-20 15:49:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726198585] [2024-06-20 15:49:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726198585] [2024-06-20 15:49:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726198585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:49:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943055159] [2024-06-20 15:49:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:49:49,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:49:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:49:49,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:49:49,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-20 15:49:49,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:49,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:49:49,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:49,552 INFO L124 PetriNetUnfolderBase]: 1676/2622 cut-off events. [2024-06-20 15:49:49,552 INFO L125 PetriNetUnfolderBase]: For 7426/7426 co-relation queries the response was YES. [2024-06-20 15:49:49,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 2622 events. 1676/2622 cut-off events. For 7426/7426 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13331 event pairs, 949 based on Foata normal form. 2/2591 useless extension candidates. Maximal degree in co-relation 8918. Up to 2484 conditions per place. [2024-06-20 15:49:49,575 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-20 15:49:49,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 505 flow [2024-06-20 15:49:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:49:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:49:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 15:49:49,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-20 15:49:49,577 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-20 15:49:49,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 505 flow [2024-06-20 15:49:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 439 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:49,582 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 320 flow [2024-06-20 15:49:49,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-20 15:49:49,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-20 15:49:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 320 flow [2024-06-20 15:49:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-20 15:49:49,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:49,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:49:49,585 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)] === [2024-06-20 15:49:49,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 27358305, now seen corresponding path program 1 times [2024-06-20 15:49:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:49,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991743570] [2024-06-20 15:49:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:50,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991743570] [2024-06-20 15:49:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991743570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:50,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:49:50,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133146983] [2024-06-20 15:49:50,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:49:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:49:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:49:50,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:50,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:50,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:50,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:50,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:50,938 INFO L124 PetriNetUnfolderBase]: 1967/3039 cut-off events. [2024-06-20 15:49:50,939 INFO L125 PetriNetUnfolderBase]: For 9360/9360 co-relation queries the response was YES. [2024-06-20 15:49:50,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10273 conditions, 3039 events. 1967/3039 cut-off events. For 9360/9360 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15224 event pairs, 1130 based on Foata normal form. 2/3027 useless extension candidates. Maximal degree in co-relation 10248. Up to 2896 conditions per place. [2024-06-20 15:49:50,953 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 15:49:50,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 518 flow [2024-06-20 15:49:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:49:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:49:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 15:49:50,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:49:50,956 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 320 flow. Second operand 6 states and 114 transitions. [2024-06-20 15:49:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 518 flow [2024-06-20 15:49:50,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 493 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:50,967 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 353 flow [2024-06-20 15:49:50,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-20 15:49:50,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-20 15:49:50,969 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 353 flow [2024-06-20 15:49:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:50,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:50,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:50,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:49:50,970 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)] === [2024-06-20 15:49:50,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash 367094722, now seen corresponding path program 1 times [2024-06-20 15:49:50,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:50,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479217356] [2024-06-20 15:49:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:50,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:51,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479217356] [2024-06-20 15:49:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479217356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:51,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:51,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:49:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423923048] [2024-06-20 15:49:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:49:51,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:49:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:49:51,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:49:51,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:51,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:51,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:49:51,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:52,295 INFO L124 PetriNetUnfolderBase]: 1929/3063 cut-off events. [2024-06-20 15:49:52,296 INFO L125 PetriNetUnfolderBase]: For 11808/11822 co-relation queries the response was YES. [2024-06-20 15:49:52,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 3063 events. 1929/3063 cut-off events. For 11808/11822 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15856 event pairs, 731 based on Foata normal form. 16/3076 useless extension candidates. Maximal degree in co-relation 11011. Up to 2723 conditions per place. [2024-06-20 15:49:52,355 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 65 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2024-06-20 15:49:52,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 102 transitions, 747 flow [2024-06-20 15:49:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-20 15:49:52,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2024-06-20 15:49:52,356 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 353 flow. Second operand 7 states and 150 transitions. [2024-06-20 15:49:52,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 102 transitions, 747 flow [2024-06-20 15:49:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 713 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:49:52,363 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 509 flow [2024-06-20 15:49:52,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=509, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2024-06-20 15:49:52,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-20 15:49:52,365 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 509 flow [2024-06-20 15:49:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:52,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:52,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:49:52,366 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)] === [2024-06-20 15:49:52,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 482213962, now seen corresponding path program 2 times [2024-06-20 15:49:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552238107] [2024-06-20 15:49:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552238107] [2024-06-20 15:49:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552238107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:53,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:49:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265412168] [2024-06-20 15:49:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:53,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:49:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:49:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:49:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:49:53,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 509 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:53,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:53,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:49:53,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:53,711 INFO L124 PetriNetUnfolderBase]: 1939/3079 cut-off events. [2024-06-20 15:49:53,711 INFO L125 PetriNetUnfolderBase]: For 14211/14225 co-relation queries the response was YES. [2024-06-20 15:49:53,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11696 conditions, 3079 events. 1939/3079 cut-off events. For 14211/14225 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15955 event pairs, 737 based on Foata normal form. 18/3094 useless extension candidates. Maximal degree in co-relation 11668. Up to 2727 conditions per place. [2024-06-20 15:49:53,729 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 35 changer transitions 0/101 dead transitions. [2024-06-20 15:49:53,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 837 flow [2024-06-20 15:49:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:49:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:49:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-20 15:49:53,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-20 15:49:53,730 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 509 flow. Second operand 6 states and 128 transitions. [2024-06-20 15:49:53,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 837 flow [2024-06-20 15:49:53,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 795 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:49:53,741 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 608 flow [2024-06-20 15:49:53,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-20 15:49:53,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-20 15:49:53,742 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 608 flow [2024-06-20 15:49:53,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:53,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:53,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:53,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:49:53,743 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)] === [2024-06-20 15:49:53,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash 860815102, now seen corresponding path program 3 times [2024-06-20 15:49:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990595654] [2024-06-20 15:49:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990595654] [2024-06-20 15:49:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990595654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:54,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:49:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709667619] [2024-06-20 15:49:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:49:54,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:49:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:49:54,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:49:54,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 608 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:54,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:54,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:49:54,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:55,053 INFO L124 PetriNetUnfolderBase]: 1951/3058 cut-off events. [2024-06-20 15:49:55,054 INFO L125 PetriNetUnfolderBase]: For 17358/17358 co-relation queries the response was YES. [2024-06-20 15:49:55,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12094 conditions, 3058 events. 1951/3058 cut-off events. For 17358/17358 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15672 event pairs, 1053 based on Foata normal form. 3/3020 useless extension candidates. Maximal degree in co-relation 12065. Up to 2849 conditions per place. [2024-06-20 15:49:55,072 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-20 15:49:55,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 830 flow [2024-06-20 15:49:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:49:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:49:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 15:49:55,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-20 15:49:55,074 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 608 flow. Second operand 6 states and 119 transitions. [2024-06-20 15:49:55,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 830 flow [2024-06-20 15:49:55,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 776 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:49:55,085 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 592 flow [2024-06-20 15:49:55,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-20 15:49:55,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-20 15:49:55,086 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 592 flow [2024-06-20 15:49:55,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-20 15:49:55,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:55,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:49:55,087 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)] === [2024-06-20 15:49:55,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 848109008, now seen corresponding path program 1 times [2024-06-20 15:49:55,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:55,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914068975] [2024-06-20 15:49:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:55,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914068975] [2024-06-20 15:49:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914068975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:55,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:49:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359151850] [2024-06-20 15:49:55,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:49:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:49:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:49:55,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:55,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:55,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:55,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:55,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:56,738 INFO L124 PetriNetUnfolderBase]: 2026/3127 cut-off events. [2024-06-20 15:49:56,738 INFO L125 PetriNetUnfolderBase]: For 16645/16645 co-relation queries the response was YES. [2024-06-20 15:49:56,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12108 conditions, 3127 events. 2026/3127 cut-off events. For 16645/16645 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15619 event pairs, 1085 based on Foata normal form. 4/3117 useless extension candidates. Maximal degree in co-relation 12078. Up to 2962 conditions per place. [2024-06-20 15:49:56,752 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2024-06-20 15:49:56,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 870 flow [2024-06-20 15:49:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:49:56,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-20 15:49:56,754 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 592 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:49:56,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 870 flow [2024-06-20 15:49:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 795 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:49:56,764 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 585 flow [2024-06-20 15:49:56,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-20 15:49:56,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-20 15:49:56,765 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 585 flow [2024-06-20 15:49:56,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:56,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:56,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:56,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:49:56,765 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)] === [2024-06-20 15:49:56,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash -439755932, now seen corresponding path program 1 times [2024-06-20 15:49:56,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:56,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273219504] [2024-06-20 15:49:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:56,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:57,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273219504] [2024-06-20 15:49:57,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273219504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:57,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:57,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:49:57,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507227004] [2024-06-20 15:49:57,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:57,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:49:57,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:49:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:49:57,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 585 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:57,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:57,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:57,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:58,179 INFO L124 PetriNetUnfolderBase]: 2074/3237 cut-off events. [2024-06-20 15:49:58,180 INFO L125 PetriNetUnfolderBase]: For 19362/19376 co-relation queries the response was YES. [2024-06-20 15:49:58,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 3237 events. 2074/3237 cut-off events. For 19362/19376 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16392 event pairs, 750 based on Foata normal form. 13/3247 useless extension candidates. Maximal degree in co-relation 12989. Up to 2829 conditions per place. [2024-06-20 15:49:58,197 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 83 selfloop transitions, 41 changer transitions 0/129 dead transitions. [2024-06-20 15:49:58,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1110 flow [2024-06-20 15:49:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:49:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:49:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:49:58,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-20 15:49:58,198 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 585 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:49:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1110 flow [2024-06-20 15:49:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 1066 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:49:58,209 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 740 flow [2024-06-20 15:49:58,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2024-06-20 15:49:58,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-20 15:49:58,210 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 740 flow [2024-06-20 15:49:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:58,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:58,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:49:58,211 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)] === [2024-06-20 15:49:58,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2063732456, now seen corresponding path program 2 times [2024-06-20 15:49:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198686804] [2024-06-20 15:49:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:49:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:49:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:49:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198686804] [2024-06-20 15:49:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198686804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:49:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:49:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:49:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624244414] [2024-06-20 15:49:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:49:59,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:49:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:49:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:49:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:49:59,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:49:59,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 740 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:59,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:49:59,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:49:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:49:59,605 INFO L124 PetriNetUnfolderBase]: 2110/3292 cut-off events. [2024-06-20 15:49:59,605 INFO L125 PetriNetUnfolderBase]: For 24128/24143 co-relation queries the response was YES. [2024-06-20 15:49:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 3292 events. 2110/3292 cut-off events. For 24128/24143 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16637 event pairs, 754 based on Foata normal form. 18/3307 useless extension candidates. Maximal degree in co-relation 14245. Up to 2861 conditions per place. [2024-06-20 15:49:59,623 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 50 changer transitions 0/128 dead transitions. [2024-06-20 15:49:59,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1197 flow [2024-06-20 15:49:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:49:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:49:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 15:49:59,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-20 15:49:59,625 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 740 flow. Second operand 7 states and 143 transitions. [2024-06-20 15:49:59,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1197 flow [2024-06-20 15:49:59,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1158 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:49:59,641 INFO L231 Difference]: Finished difference. Result has 84 places, 103 transitions, 892 flow [2024-06-20 15:49:59,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=84, PETRI_TRANSITIONS=103} [2024-06-20 15:49:59,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-20 15:49:59,641 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 103 transitions, 892 flow [2024-06-20 15:49:59,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:49:59,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:49:59,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:49:59,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:49:59,642 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:49:59,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:49:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash 909446948, now seen corresponding path program 3 times [2024-06-20 15:49:59,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:49:59,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741578686] [2024-06-20 15:49:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:49:59,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:49:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:00,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:00,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741578686] [2024-06-20 15:50:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741578686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:00,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771888303] [2024-06-20 15:50:00,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:00,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:00,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 103 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:00,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:00,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:01,070 INFO L124 PetriNetUnfolderBase]: 2128/3303 cut-off events. [2024-06-20 15:50:01,071 INFO L125 PetriNetUnfolderBase]: For 28522/28522 co-relation queries the response was YES. [2024-06-20 15:50:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15109 conditions, 3303 events. 2128/3303 cut-off events. For 28522/28522 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16657 event pairs, 1074 based on Foata normal form. 3/3294 useless extension candidates. Maximal degree in co-relation 15074. Up to 3116 conditions per place. [2024-06-20 15:50:01,085 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 104 selfloop transitions, 17 changer transitions 0/126 dead transitions. [2024-06-20 15:50:01,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1265 flow [2024-06-20 15:50:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:50:01,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-20 15:50:01,087 INFO L175 Difference]: Start difference. First operand has 84 places, 103 transitions, 892 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:50:01,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1265 flow [2024-06-20 15:50:01,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1153 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:01,111 INFO L231 Difference]: Finished difference. Result has 87 places, 108 transitions, 902 flow [2024-06-20 15:50:01,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=87, PETRI_TRANSITIONS=108} [2024-06-20 15:50:01,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-20 15:50:01,112 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 108 transitions, 902 flow [2024-06-20 15:50:01,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:01,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:01,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:50:01,113 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)] === [2024-06-20 15:50:01,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2054103320, now seen corresponding path program 4 times [2024-06-20 15:50:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143190648] [2024-06-20 15:50:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:01,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:01,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143190648] [2024-06-20 15:50:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143190648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:01,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732232591] [2024-06-20 15:50:01,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:02,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:02,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:02,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:02,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:02,551 INFO L124 PetriNetUnfolderBase]: 2120/3293 cut-off events. [2024-06-20 15:50:02,551 INFO L125 PetriNetUnfolderBase]: For 28077/28077 co-relation queries the response was YES. [2024-06-20 15:50:02,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14813 conditions, 3293 events. 2120/3293 cut-off events. For 28077/28077 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16606 event pairs, 1072 based on Foata normal form. 3/3284 useless extension candidates. Maximal degree in co-relation 14777. Up to 3080 conditions per place. [2024-06-20 15:50:02,571 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 101 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-20 15:50:02,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 132 transitions, 1301 flow [2024-06-20 15:50:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 15:50:02,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:50:02,572 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 902 flow. Second operand 7 states and 133 transitions. [2024-06-20 15:50:02,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 132 transitions, 1301 flow [2024-06-20 15:50:02,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 1235 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:02,597 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 981 flow [2024-06-20 15:50:02,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=981, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2024-06-20 15:50:02,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-20 15:50:02,597 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 981 flow [2024-06-20 15:50:02,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:02,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:02,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:50:02,598 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:02,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1253364638, now seen corresponding path program 1 times [2024-06-20 15:50:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:02,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949612838] [2024-06-20 15:50:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:02,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:03,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:03,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949612838] [2024-06-20 15:50:03,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949612838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:03,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:03,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:50:03,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057106928] [2024-06-20 15:50:03,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:03,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:50:03,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:03,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:50:03,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:50:03,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:50:03,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 981 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-20 15:50:03,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:03,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:50:03,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:03,872 INFO L124 PetriNetUnfolderBase]: 2648/3969 cut-off events. [2024-06-20 15:50:03,873 INFO L125 PetriNetUnfolderBase]: For 42315/42316 co-relation queries the response was YES. [2024-06-20 15:50:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18525 conditions, 3969 events. 2648/3969 cut-off events. For 42315/42316 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19239 event pairs, 1407 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 18488. Up to 3833 conditions per place. [2024-06-20 15:50:03,897 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 99 selfloop transitions, 10 changer transitions 0/123 dead transitions. [2024-06-20 15:50:03,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1245 flow [2024-06-20 15:50:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:50:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:50:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 15:50:03,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-20 15:50:03,898 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 981 flow. Second operand 6 states and 99 transitions. [2024-06-20 15:50:03,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1245 flow [2024-06-20 15:50:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 1152 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:03,942 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 944 flow [2024-06-20 15:50:03,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=944, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2024-06-20 15:50:03,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-20 15:50:03,942 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 944 flow [2024-06-20 15:50:03,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-20 15:50:03,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:03,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:03,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:50:03,943 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)] === [2024-06-20 15:50:03,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash 759241161, now seen corresponding path program 1 times [2024-06-20 15:50:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:03,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706455101] [2024-06-20 15:50:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:03,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:04,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706455101] [2024-06-20 15:50:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706455101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:04,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:04,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855407615] [2024-06-20 15:50:04,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:05,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:05,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 944 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:05,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:05,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:05,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:05,674 INFO L124 PetriNetUnfolderBase]: 2155/3369 cut-off events. [2024-06-20 15:50:05,674 INFO L125 PetriNetUnfolderBase]: For 40240/40255 co-relation queries the response was YES. [2024-06-20 15:50:05,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16484 conditions, 3369 events. 2155/3369 cut-off events. For 40240/40255 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17288 event pairs, 728 based on Foata normal form. 16/3382 useless extension candidates. Maximal degree in co-relation 16446. Up to 2910 conditions per place. [2024-06-20 15:50:05,699 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 98 selfloop transitions, 44 changer transitions 0/159 dead transitions. [2024-06-20 15:50:05,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 159 transitions, 1458 flow [2024-06-20 15:50:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:50:05,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:50:05,702 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 944 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:50:05,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 159 transitions, 1458 flow [2024-06-20 15:50:05,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1424 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:05,774 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 1108 flow [2024-06-20 15:50:05,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1108, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2024-06-20 15:50:05,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-20 15:50:05,775 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 1108 flow [2024-06-20 15:50:05,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:05,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:05,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:50:05,777 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)] === [2024-06-20 15:50:05,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1119503229, now seen corresponding path program 2 times [2024-06-20 15:50:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:05,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86036017] [2024-06-20 15:50:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86036017] [2024-06-20 15:50:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86036017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:06,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:06,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:50:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919779475] [2024-06-20 15:50:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:50:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:50:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:50:06,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:06,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 1108 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:06,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:06,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:07,149 INFO L124 PetriNetUnfolderBase]: 2195/3430 cut-off events. [2024-06-20 15:50:07,150 INFO L125 PetriNetUnfolderBase]: For 46763/46782 co-relation queries the response was YES. [2024-06-20 15:50:07,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17678 conditions, 3430 events. 2195/3430 cut-off events. For 46763/46782 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17662 event pairs, 735 based on Foata normal form. 20/3447 useless extension candidates. Maximal degree in co-relation 17638. Up to 2909 conditions per place. [2024-06-20 15:50:07,174 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 57 changer transitions 0/167 dead transitions. [2024-06-20 15:50:07,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 1738 flow [2024-06-20 15:50:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-20 15:50:07,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083056478405316 [2024-06-20 15:50:07,176 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 1108 flow. Second operand 7 states and 153 transitions. [2024-06-20 15:50:07,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 1738 flow [2024-06-20 15:50:07,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 167 transitions, 1665 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:07,221 INFO L231 Difference]: Finished difference. Result has 100 places, 141 transitions, 1372 flow [2024-06-20 15:50:07,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1372, PETRI_PLACES=100, PETRI_TRANSITIONS=141} [2024-06-20 15:50:07,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-20 15:50:07,223 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 141 transitions, 1372 flow [2024-06-20 15:50:07,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:07,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:07,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:07,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:50:07,224 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)] === [2024-06-20 15:50:07,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash 591011978, now seen corresponding path program 1 times [2024-06-20 15:50:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:07,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045145575] [2024-06-20 15:50:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:07,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045145575] [2024-06-20 15:50:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045145575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:07,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256381950] [2024-06-20 15:50:07,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:08,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:08,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 141 transitions, 1372 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:08,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:08,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:08,821 INFO L124 PetriNetUnfolderBase]: 2340/3596 cut-off events. [2024-06-20 15:50:08,821 INFO L125 PetriNetUnfolderBase]: For 54391/54404 co-relation queries the response was YES. [2024-06-20 15:50:08,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19657 conditions, 3596 events. 2340/3596 cut-off events. For 54391/54404 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18160 event pairs, 793 based on Foata normal form. 12/3605 useless extension candidates. Maximal degree in co-relation 19613. Up to 3122 conditions per place. [2024-06-20 15:50:08,844 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 113 selfloop transitions, 68 changer transitions 0/187 dead transitions. [2024-06-20 15:50:08,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 2169 flow [2024-06-20 15:50:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-20 15:50:08,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:50:08,846 INFO L175 Difference]: Start difference. First operand has 100 places, 141 transitions, 1372 flow. Second operand 8 states and 168 transitions. [2024-06-20 15:50:08,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 2169 flow [2024-06-20 15:50:08,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 187 transitions, 2115 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 15:50:08,887 INFO L231 Difference]: Finished difference. Result has 107 places, 157 transitions, 1713 flow [2024-06-20 15:50:08,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1713, PETRI_PLACES=107, PETRI_TRANSITIONS=157} [2024-06-20 15:50:08,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-20 15:50:08,888 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 157 transitions, 1713 flow [2024-06-20 15:50:08,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:08,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:08,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:50:08,889 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)] === [2024-06-20 15:50:08,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash 590758305, now seen corresponding path program 1 times [2024-06-20 15:50:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:08,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203211477] [2024-06-20 15:50:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:09,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:09,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203211477] [2024-06-20 15:50:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203211477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:09,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191373605] [2024-06-20 15:50:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:09,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:09,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 157 transitions, 1713 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:09,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:09,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:09,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:10,602 INFO L124 PetriNetUnfolderBase]: 2444/3760 cut-off events. [2024-06-20 15:50:10,602 INFO L125 PetriNetUnfolderBase]: For 56405/56424 co-relation queries the response was YES. [2024-06-20 15:50:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20587 conditions, 3760 events. 2444/3760 cut-off events. For 56405/56424 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19092 event pairs, 725 based on Foata normal form. 24/3781 useless extension candidates. Maximal degree in co-relation 20540. Up to 3097 conditions per place. [2024-06-20 15:50:10,626 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 134 selfloop transitions, 67 changer transitions 0/207 dead transitions. [2024-06-20 15:50:10,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 207 transitions, 2497 flow [2024-06-20 15:50:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:50:10,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:50:10,628 INFO L175 Difference]: Start difference. First operand has 107 places, 157 transitions, 1713 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:50:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 207 transitions, 2497 flow [2024-06-20 15:50:10,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 207 transitions, 2383 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:10,685 INFO L231 Difference]: Finished difference. Result has 114 places, 171 transitions, 1913 flow [2024-06-20 15:50:10,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1913, PETRI_PLACES=114, PETRI_TRANSITIONS=171} [2024-06-20 15:50:10,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-20 15:50:10,686 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 171 transitions, 1913 flow [2024-06-20 15:50:10,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:10,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:10,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:50:10,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -747089848, now seen corresponding path program 2 times [2024-06-20 15:50:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339907671] [2024-06-20 15:50:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:10,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339907671] [2024-06-20 15:50:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339907671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:11,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417388572] [2024-06-20 15:50:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:11,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 171 transitions, 1913 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:12,294 INFO L124 PetriNetUnfolderBase]: 2480/3816 cut-off events. [2024-06-20 15:50:12,294 INFO L125 PetriNetUnfolderBase]: For 64560/64579 co-relation queries the response was YES. [2024-06-20 15:50:12,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22266 conditions, 3816 events. 2480/3816 cut-off events. For 64560/64579 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19453 event pairs, 739 based on Foata normal form. 18/3831 useless extension candidates. Maximal degree in co-relation 22216. Up to 3303 conditions per place. [2024-06-20 15:50:12,321 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 77 changer transitions 0/212 dead transitions. [2024-06-20 15:50:12,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 212 transitions, 2732 flow [2024-06-20 15:50:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 15:50:12,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-20 15:50:12,323 INFO L175 Difference]: Start difference. First operand has 114 places, 171 transitions, 1913 flow. Second operand 8 states and 165 transitions. [2024-06-20 15:50:12,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 212 transitions, 2732 flow [2024-06-20 15:50:12,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 212 transitions, 2684 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:50:12,390 INFO L231 Difference]: Finished difference. Result has 120 places, 184 transitions, 2224 flow [2024-06-20 15:50:12,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=120, PETRI_TRANSITIONS=184} [2024-06-20 15:50:12,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-20 15:50:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 184 transitions, 2224 flow [2024-06-20 15:50:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:12,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:12,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:50:12,391 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)] === [2024-06-20 15:50:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 499091489, now seen corresponding path program 3 times [2024-06-20 15:50:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:12,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374714626] [2024-06-20 15:50:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374714626] [2024-06-20 15:50:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374714626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:13,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:13,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317203983] [2024-06-20 15:50:13,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 184 transitions, 2224 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:14,325 INFO L124 PetriNetUnfolderBase]: 2342/3671 cut-off events. [2024-06-20 15:50:14,325 INFO L125 PetriNetUnfolderBase]: For 70719/70738 co-relation queries the response was YES. [2024-06-20 15:50:14,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 3671 events. 2342/3671 cut-off events. For 70719/70738 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19127 event pairs, 684 based on Foata normal form. 22/3690 useless extension candidates. Maximal degree in co-relation 21968. Up to 3098 conditions per place. [2024-06-20 15:50:14,348 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 122 selfloop transitions, 67 changer transitions 0/212 dead transitions. [2024-06-20 15:50:14,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 2740 flow [2024-06-20 15:50:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:50:14,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-20 15:50:14,350 INFO L175 Difference]: Start difference. First operand has 120 places, 184 transitions, 2224 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:50:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 2740 flow [2024-06-20 15:50:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 212 transitions, 2604 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 15:50:14,408 INFO L231 Difference]: Finished difference. Result has 125 places, 184 transitions, 2247 flow [2024-06-20 15:50:14,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2247, PETRI_PLACES=125, PETRI_TRANSITIONS=184} [2024-06-20 15:50:14,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-20 15:50:14,409 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 184 transitions, 2247 flow [2024-06-20 15:50:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:14,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:14,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:50:14,410 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)] === [2024-06-20 15:50:14,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -448801751, now seen corresponding path program 2 times [2024-06-20 15:50:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762068533] [2024-06-20 15:50:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:15,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:15,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762068533] [2024-06-20 15:50:15,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762068533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:15,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:15,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982001743] [2024-06-20 15:50:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:15,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:15,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:15,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:15,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:15,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:15,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 184 transitions, 2247 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:16,079 INFO L124 PetriNetUnfolderBase]: 2573/3964 cut-off events. [2024-06-20 15:50:16,079 INFO L125 PetriNetUnfolderBase]: For 80836/80851 co-relation queries the response was YES. [2024-06-20 15:50:16,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23952 conditions, 3964 events. 2573/3964 cut-off events. For 80836/80851 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20338 event pairs, 731 based on Foata normal form. 24/3985 useless extension candidates. Maximal degree in co-relation 23897. Up to 3163 conditions per place. [2024-06-20 15:50:16,107 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 130 selfloop transitions, 93 changer transitions 0/229 dead transitions. [2024-06-20 15:50:16,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 229 transitions, 3103 flow [2024-06-20 15:50:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 15:50:16,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-20 15:50:16,108 INFO L175 Difference]: Start difference. First operand has 125 places, 184 transitions, 2247 flow. Second operand 8 states and 165 transitions. [2024-06-20 15:50:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 229 transitions, 3103 flow [2024-06-20 15:50:16,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 229 transitions, 2950 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:16,187 INFO L231 Difference]: Finished difference. Result has 127 places, 196 transitions, 2463 flow [2024-06-20 15:50:16,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=127, PETRI_TRANSITIONS=196} [2024-06-20 15:50:16,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-20 15:50:16,188 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 196 transitions, 2463 flow [2024-06-20 15:50:16,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:16,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:16,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:16,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:50:16,189 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)] === [2024-06-20 15:50:16,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:16,189 INFO L85 PathProgramCache]: Analyzing trace with hash -448807548, now seen corresponding path program 3 times [2024-06-20 15:50:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:16,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926225694] [2024-06-20 15:50:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:16,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:17,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926225694] [2024-06-20 15:50:17,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926225694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:17,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:17,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047060997] [2024-06-20 15:50:17,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:17,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:17,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 196 transitions, 2463 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:17,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:17,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:17,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:17,804 INFO L124 PetriNetUnfolderBase]: 2635/4040 cut-off events. [2024-06-20 15:50:17,804 INFO L125 PetriNetUnfolderBase]: For 92516/92555 co-relation queries the response was YES. [2024-06-20 15:50:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25645 conditions, 4040 events. 2635/4040 cut-off events. For 92516/92555 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20849 event pairs, 934 based on Foata normal form. 14/4022 useless extension candidates. Maximal degree in co-relation 25589. Up to 3526 conditions per place. [2024-06-20 15:50:17,834 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 130 selfloop transitions, 94 changer transitions 0/230 dead transitions. [2024-06-20 15:50:17,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 230 transitions, 3266 flow [2024-06-20 15:50:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 15:50:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-20 15:50:17,836 INFO L175 Difference]: Start difference. First operand has 127 places, 196 transitions, 2463 flow. Second operand 7 states and 146 transitions. [2024-06-20 15:50:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 230 transitions, 3266 flow [2024-06-20 15:50:17,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 230 transitions, 3103 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:17,932 INFO L231 Difference]: Finished difference. Result has 130 places, 202 transitions, 2626 flow [2024-06-20 15:50:17,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=130, PETRI_TRANSITIONS=202} [2024-06-20 15:50:17,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-20 15:50:17,933 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 202 transitions, 2626 flow [2024-06-20 15:50:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:17,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:17,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:50:17,934 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)] === [2024-06-20 15:50:17,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -448801968, now seen corresponding path program 4 times [2024-06-20 15:50:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222496929] [2024-06-20 15:50:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222496929] [2024-06-20 15:50:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222496929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:18,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:18,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060930050] [2024-06-20 15:50:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:18,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:18,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:18,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:18,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 202 transitions, 2626 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:18,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:18,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:18,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:19,464 INFO L124 PetriNetUnfolderBase]: 2613/4019 cut-off events. [2024-06-20 15:50:19,464 INFO L125 PetriNetUnfolderBase]: For 87367/87382 co-relation queries the response was YES. [2024-06-20 15:50:19,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25071 conditions, 4019 events. 2613/4019 cut-off events. For 87367/87382 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20594 event pairs, 743 based on Foata normal form. 16/4032 useless extension candidates. Maximal degree in co-relation 25013. Up to 3483 conditions per place. [2024-06-20 15:50:19,498 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 133 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2024-06-20 15:50:19,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 235 transitions, 3469 flow [2024-06-20 15:50:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 15:50:19,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 15:50:19,500 INFO L175 Difference]: Start difference. First operand has 130 places, 202 transitions, 2626 flow. Second operand 7 states and 142 transitions. [2024-06-20 15:50:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 235 transitions, 3469 flow [2024-06-20 15:50:19,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 235 transitions, 3190 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:19,620 INFO L231 Difference]: Finished difference. Result has 131 places, 211 transitions, 2757 flow [2024-06-20 15:50:19,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2757, PETRI_PLACES=131, PETRI_TRANSITIONS=211} [2024-06-20 15:50:19,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-20 15:50:19,621 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 211 transitions, 2757 flow [2024-06-20 15:50:19,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:19,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:19,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:19,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:50:19,622 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)] === [2024-06-20 15:50:19,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1871647221, now seen corresponding path program 3 times [2024-06-20 15:50:19,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:19,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208295276] [2024-06-20 15:50:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:20,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:20,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208295276] [2024-06-20 15:50:20,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208295276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:20,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:20,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:20,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913314479] [2024-06-20 15:50:20,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:20,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:20,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:20,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:20,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 211 transitions, 2757 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:20,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:20,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:20,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:21,311 INFO L124 PetriNetUnfolderBase]: 2664/4099 cut-off events. [2024-06-20 15:50:21,312 INFO L125 PetriNetUnfolderBase]: For 90663/90673 co-relation queries the response was YES. [2024-06-20 15:50:21,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25658 conditions, 4099 events. 2664/4099 cut-off events. For 90663/90673 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21151 event pairs, 1086 based on Foata normal form. 6/4088 useless extension candidates. Maximal degree in co-relation 25600. Up to 3825 conditions per place. [2024-06-20 15:50:21,342 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 214 selfloop transitions, 22 changer transitions 0/242 dead transitions. [2024-06-20 15:50:21,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 242 transitions, 3450 flow [2024-06-20 15:50:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 15:50:21,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-20 15:50:21,353 INFO L175 Difference]: Start difference. First operand has 131 places, 211 transitions, 2757 flow. Second operand 9 states and 160 transitions. [2024-06-20 15:50:21,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 242 transitions, 3450 flow [2024-06-20 15:50:21,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 242 transitions, 3230 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:21,436 INFO L231 Difference]: Finished difference. Result has 135 places, 217 transitions, 2707 flow [2024-06-20 15:50:21,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2707, PETRI_PLACES=135, PETRI_TRANSITIONS=217} [2024-06-20 15:50:21,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-20 15:50:21,436 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 217 transitions, 2707 flow [2024-06-20 15:50:21,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:21,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:21,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:21,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:50:21,437 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)] === [2024-06-20 15:50:21,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash 754659506, now seen corresponding path program 5 times [2024-06-20 15:50:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:21,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825191077] [2024-06-20 15:50:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:21,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:22,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825191077] [2024-06-20 15:50:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825191077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:22,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:22,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:22,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034864325] [2024-06-20 15:50:22,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:22,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:22,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:22,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 217 transitions, 2707 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:22,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:22,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:22,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:22,925 INFO L124 PetriNetUnfolderBase]: 2653/4085 cut-off events. [2024-06-20 15:50:22,926 INFO L125 PetriNetUnfolderBase]: For 89546/89559 co-relation queries the response was YES. [2024-06-20 15:50:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25328 conditions, 4085 events. 2653/4085 cut-off events. For 89546/89559 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21111 event pairs, 1088 based on Foata normal form. 6/4073 useless extension candidates. Maximal degree in co-relation 25270. Up to 3817 conditions per place. [2024-06-20 15:50:22,959 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 27 changer transitions 0/235 dead transitions. [2024-06-20 15:50:22,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 235 transitions, 3251 flow [2024-06-20 15:50:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 15:50:22,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 15:50:22,960 INFO L175 Difference]: Start difference. First operand has 135 places, 217 transitions, 2707 flow. Second operand 8 states and 143 transitions. [2024-06-20 15:50:22,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 235 transitions, 3251 flow [2024-06-20 15:50:23,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 235 transitions, 3071 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:23,067 INFO L231 Difference]: Finished difference. Result has 136 places, 217 transitions, 2596 flow [2024-06-20 15:50:23,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=136, PETRI_TRANSITIONS=217} [2024-06-20 15:50:23,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-20 15:50:23,068 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 217 transitions, 2596 flow [2024-06-20 15:50:23,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:23,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:23,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:50:23,068 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)] === [2024-06-20 15:50:23,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1871914131, now seen corresponding path program 4 times [2024-06-20 15:50:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804968121] [2024-06-20 15:50:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:23,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804968121] [2024-06-20 15:50:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804968121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:23,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3657500] [2024-06-20 15:50:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:24,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:24,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 217 transitions, 2596 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:24,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:24,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:24,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:24,848 INFO L124 PetriNetUnfolderBase]: 2689/4145 cut-off events. [2024-06-20 15:50:24,848 INFO L125 PetriNetUnfolderBase]: For 96179/96189 co-relation queries the response was YES. [2024-06-20 15:50:24,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25820 conditions, 4145 events. 2689/4145 cut-off events. For 96179/96189 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21553 event pairs, 1088 based on Foata normal form. 6/4134 useless extension candidates. Maximal degree in co-relation 25762. Up to 3823 conditions per place. [2024-06-20 15:50:24,876 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 214 selfloop transitions, 32 changer transitions 0/252 dead transitions. [2024-06-20 15:50:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 252 transitions, 3357 flow [2024-06-20 15:50:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 15:50:24,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:50:24,877 INFO L175 Difference]: Start difference. First operand has 136 places, 217 transitions, 2596 flow. Second operand 8 states and 152 transitions. [2024-06-20 15:50:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 252 transitions, 3357 flow [2024-06-20 15:50:24,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 252 transitions, 3182 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:50:24,947 INFO L231 Difference]: Finished difference. Result has 135 places, 223 transitions, 2625 flow [2024-06-20 15:50:24,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2625, PETRI_PLACES=135, PETRI_TRANSITIONS=223} [2024-06-20 15:50:24,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-20 15:50:24,948 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 223 transitions, 2625 flow [2024-06-20 15:50:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:24,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:24,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:50:24,948 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)] === [2024-06-20 15:50:24,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1018607313, now seen corresponding path program 5 times [2024-06-20 15:50:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:24,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679603751] [2024-06-20 15:50:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:24,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679603751] [2024-06-20 15:50:25,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679603751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:25,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:25,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421500062] [2024-06-20 15:50:25,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:25,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:26,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:26,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 223 transitions, 2625 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:26,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:26,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:26,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:26,717 INFO L124 PetriNetUnfolderBase]: 2673/4121 cut-off events. [2024-06-20 15:50:26,717 INFO L125 PetriNetUnfolderBase]: For 101373/101383 co-relation queries the response was YES. [2024-06-20 15:50:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26014 conditions, 4121 events. 2673/4121 cut-off events. For 101373/101383 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21337 event pairs, 1081 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 25955. Up to 3743 conditions per place. [2024-06-20 15:50:26,747 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 202 selfloop transitions, 51 changer transitions 0/259 dead transitions. [2024-06-20 15:50:26,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 259 transitions, 3433 flow [2024-06-20 15:50:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 15:50:26,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-20 15:50:26,749 INFO L175 Difference]: Start difference. First operand has 135 places, 223 transitions, 2625 flow. Second operand 9 states and 165 transitions. [2024-06-20 15:50:26,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 259 transitions, 3433 flow [2024-06-20 15:50:26,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 259 transitions, 3295 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:26,842 INFO L231 Difference]: Finished difference. Result has 138 places, 229 transitions, 2741 flow [2024-06-20 15:50:26,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2741, PETRI_PLACES=138, PETRI_TRANSITIONS=229} [2024-06-20 15:50:26,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-20 15:50:26,844 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 229 transitions, 2741 flow [2024-06-20 15:50:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:26,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:26,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:50:26,844 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)] === [2024-06-20 15:50:26,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash 199599284, now seen corresponding path program 1 times [2024-06-20 15:50:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572234164] [2024-06-20 15:50:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572234164] [2024-06-20 15:50:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572234164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:27,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:27,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:50:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689956190] [2024-06-20 15:50:27,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:27,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:50:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:27,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:50:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:50:27,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:50:27,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 229 transitions, 2741 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:50:27,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:27,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:50:27,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:28,420 INFO L124 PetriNetUnfolderBase]: 3127/4704 cut-off events. [2024-06-20 15:50:28,420 INFO L125 PetriNetUnfolderBase]: For 120482/120490 co-relation queries the response was YES. [2024-06-20 15:50:28,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29498 conditions, 4704 events. 3127/4704 cut-off events. For 120482/120490 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23207 event pairs, 1362 based on Foata normal form. 10/4705 useless extension candidates. Maximal degree in co-relation 29438. Up to 4521 conditions per place. [2024-06-20 15:50:28,454 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 13 changer transitions 0/242 dead transitions. [2024-06-20 15:50:28,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 242 transitions, 3235 flow [2024-06-20 15:50:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 15:50:28,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-20 15:50:28,455 INFO L175 Difference]: Start difference. First operand has 138 places, 229 transitions, 2741 flow. Second operand 7 states and 114 transitions. [2024-06-20 15:50:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 242 transitions, 3235 flow [2024-06-20 15:50:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 242 transitions, 3048 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:28,568 INFO L231 Difference]: Finished difference. Result has 138 places, 232 transitions, 2620 flow [2024-06-20 15:50:28,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2620, PETRI_PLACES=138, PETRI_TRANSITIONS=232} [2024-06-20 15:50:28,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-20 15:50:28,569 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 232 transitions, 2620 flow [2024-06-20 15:50:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:50:28,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:28,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:50:28,570 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)] === [2024-06-20 15:50:28,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 598858935, now seen corresponding path program 1 times [2024-06-20 15:50:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:28,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958323259] [2024-06-20 15:50:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:28,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:29,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958323259] [2024-06-20 15:50:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958323259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:29,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:29,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351818008] [2024-06-20 15:50:29,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:29,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:29,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 232 transitions, 2620 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:29,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:29,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:29,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:30,330 INFO L124 PetriNetUnfolderBase]: 2602/4078 cut-off events. [2024-06-20 15:50:30,331 INFO L125 PetriNetUnfolderBase]: For 111880/111891 co-relation queries the response was YES. [2024-06-20 15:50:30,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26319 conditions, 4078 events. 2602/4078 cut-off events. For 111880/111891 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21847 event pairs, 678 based on Foata normal form. 14/4064 useless extension candidates. Maximal degree in co-relation 26258. Up to 3438 conditions per place. [2024-06-20 15:50:30,363 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 195 selfloop transitions, 50 changer transitions 0/273 dead transitions. [2024-06-20 15:50:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 273 transitions, 3408 flow [2024-06-20 15:50:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-20 15:50:30,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-20 15:50:30,364 INFO L175 Difference]: Start difference. First operand has 138 places, 232 transitions, 2620 flow. Second operand 9 states and 188 transitions. [2024-06-20 15:50:30,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 273 transitions, 3408 flow [2024-06-20 15:50:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 273 transitions, 3364 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:30,479 INFO L231 Difference]: Finished difference. Result has 143 places, 239 transitions, 2777 flow [2024-06-20 15:50:30,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2777, PETRI_PLACES=143, PETRI_TRANSITIONS=239} [2024-06-20 15:50:30,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-20 15:50:30,480 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 239 transitions, 2777 flow [2024-06-20 15:50:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:30,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:30,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:50:30,480 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)] === [2024-06-20 15:50:30,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 684717589, now seen corresponding path program 1 times [2024-06-20 15:50:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738758192] [2024-06-20 15:50:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738758192] [2024-06-20 15:50:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738758192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:31,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:31,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:31,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333209825] [2024-06-20 15:50:31,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:31,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:31,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 239 transitions, 2777 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:31,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:31,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:32,214 INFO L124 PetriNetUnfolderBase]: 2758/4263 cut-off events. [2024-06-20 15:50:32,214 INFO L125 PetriNetUnfolderBase]: For 118915/118926 co-relation queries the response was YES. [2024-06-20 15:50:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27846 conditions, 4263 events. 2758/4263 cut-off events. For 118915/118926 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22253 event pairs, 719 based on Foata normal form. 10/4270 useless extension candidates. Maximal degree in co-relation 27783. Up to 3599 conditions per place. [2024-06-20 15:50:32,252 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 174 selfloop transitions, 104 changer transitions 0/284 dead transitions. [2024-06-20 15:50:32,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 284 transitions, 3659 flow [2024-06-20 15:50:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:50:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:50:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 15:50:32,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 15:50:32,254 INFO L175 Difference]: Start difference. First operand has 143 places, 239 transitions, 2777 flow. Second operand 11 states and 218 transitions. [2024-06-20 15:50:32,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 284 transitions, 3659 flow [2024-06-20 15:50:32,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 284 transitions, 3566 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:32,391 INFO L231 Difference]: Finished difference. Result has 149 places, 245 transitions, 2979 flow [2024-06-20 15:50:32,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2979, PETRI_PLACES=149, PETRI_TRANSITIONS=245} [2024-06-20 15:50:32,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-20 15:50:32,391 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 245 transitions, 2979 flow [2024-06-20 15:50:32,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:32,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:32,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:32,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:50:32,392 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)] === [2024-06-20 15:50:32,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1784584609, now seen corresponding path program 2 times [2024-06-20 15:50:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:32,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484197885] [2024-06-20 15:50:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:32,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484197885] [2024-06-20 15:50:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484197885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:33,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101081343] [2024-06-20 15:50:33,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:33,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:33,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 245 transitions, 2979 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:33,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:33,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:33,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:34,366 INFO L124 PetriNetUnfolderBase]: 2638/4139 cut-off events. [2024-06-20 15:50:34,366 INFO L125 PetriNetUnfolderBase]: For 128274/128285 co-relation queries the response was YES. [2024-06-20 15:50:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28056 conditions, 4139 events. 2638/4139 cut-off events. For 128274/128285 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22112 event pairs, 676 based on Foata normal form. 14/4150 useless extension candidates. Maximal degree in co-relation 27991. Up to 3545 conditions per place. [2024-06-20 15:50:34,398 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 201 selfloop transitions, 50 changer transitions 0/281 dead transitions. [2024-06-20 15:50:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 281 transitions, 3645 flow [2024-06-20 15:50:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 15:50:34,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-20 15:50:34,400 INFO L175 Difference]: Start difference. First operand has 149 places, 245 transitions, 2979 flow. Second operand 10 states and 203 transitions. [2024-06-20 15:50:34,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 281 transitions, 3645 flow [2024-06-20 15:50:34,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 281 transitions, 3498 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:34,520 INFO L231 Difference]: Finished difference. Result has 152 places, 247 transitions, 2969 flow [2024-06-20 15:50:34,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2969, PETRI_PLACES=152, PETRI_TRANSITIONS=247} [2024-06-20 15:50:34,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-20 15:50:34,521 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 247 transitions, 2969 flow [2024-06-20 15:50:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:34,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:34,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:34,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:50:34,522 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)] === [2024-06-20 15:50:34,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1617402447, now seen corresponding path program 3 times [2024-06-20 15:50:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:34,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460699139] [2024-06-20 15:50:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460699139] [2024-06-20 15:50:35,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460699139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:35,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:35,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:50:35,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119283905] [2024-06-20 15:50:35,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:50:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:50:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:50:35,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:35,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 247 transitions, 2969 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:35,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:35,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:35,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:36,131 INFO L124 PetriNetUnfolderBase]: 2751/4338 cut-off events. [2024-06-20 15:50:36,131 INFO L125 PetriNetUnfolderBase]: For 139083/139107 co-relation queries the response was YES. [2024-06-20 15:50:36,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29410 conditions, 4338 events. 2751/4338 cut-off events. For 139083/139107 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 23589 event pairs, 539 based on Foata normal form. 26/4361 useless extension candidates. Maximal degree in co-relation 29343. Up to 3396 conditions per place. [2024-06-20 15:50:36,183 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 186 selfloop transitions, 80 changer transitions 0/296 dead transitions. [2024-06-20 15:50:36,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 296 transitions, 3983 flow [2024-06-20 15:50:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:50:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:50:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-20 15:50:36,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:50:36,186 INFO L175 Difference]: Start difference. First operand has 152 places, 247 transitions, 2969 flow. Second operand 8 states and 168 transitions. [2024-06-20 15:50:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 296 transitions, 3983 flow [2024-06-20 15:50:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 296 transitions, 3852 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:36,343 INFO L231 Difference]: Finished difference. Result has 154 places, 266 transitions, 3270 flow [2024-06-20 15:50:36,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3270, PETRI_PLACES=154, PETRI_TRANSITIONS=266} [2024-06-20 15:50:36,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-20 15:50:36,344 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 266 transitions, 3270 flow [2024-06-20 15:50:36,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:36,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:36,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:36,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:50:36,345 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)] === [2024-06-20 15:50:36,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash -356942893, now seen corresponding path program 4 times [2024-06-20 15:50:36,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:36,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837452838] [2024-06-20 15:50:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:36,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837452838] [2024-06-20 15:50:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837452838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:37,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443262253] [2024-06-20 15:50:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:37,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:37,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:37,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 266 transitions, 3270 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:37,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:37,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:37,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:38,250 INFO L124 PetriNetUnfolderBase]: 2932/4629 cut-off events. [2024-06-20 15:50:38,250 INFO L125 PetriNetUnfolderBase]: For 155522/155543 co-relation queries the response was YES. [2024-06-20 15:50:38,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32249 conditions, 4629 events. 2932/4629 cut-off events. For 155522/155543 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25691 event pairs, 715 based on Foata normal form. 24/4650 useless extension candidates. Maximal degree in co-relation 32179. Up to 3801 conditions per place. [2024-06-20 15:50:38,283 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 214 selfloop transitions, 87 changer transitions 0/331 dead transitions. [2024-06-20 15:50:38,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 331 transitions, 4574 flow [2024-06-20 15:50:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:50:38,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:50:38,285 INFO L175 Difference]: Start difference. First operand has 154 places, 266 transitions, 3270 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:50:38,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 331 transitions, 4574 flow [2024-06-20 15:50:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 331 transitions, 4337 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:38,445 INFO L231 Difference]: Finished difference. Result has 161 places, 295 transitions, 3753 flow [2024-06-20 15:50:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3753, PETRI_PLACES=161, PETRI_TRANSITIONS=295} [2024-06-20 15:50:38,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-20 15:50:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 295 transitions, 3753 flow [2024-06-20 15:50:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:38,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:38,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:50:38,446 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)] === [2024-06-20 15:50:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -344846259, now seen corresponding path program 2 times [2024-06-20 15:50:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896299136] [2024-06-20 15:50:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:39,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:39,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896299136] [2024-06-20 15:50:39,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896299136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:39,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:39,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361021409] [2024-06-20 15:50:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:39,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:39,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:39,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 295 transitions, 3753 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:39,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:39,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:39,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:40,417 INFO L124 PetriNetUnfolderBase]: 3120/4840 cut-off events. [2024-06-20 15:50:40,417 INFO L125 PetriNetUnfolderBase]: For 163262/163283 co-relation queries the response was YES. [2024-06-20 15:50:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34133 conditions, 4840 events. 3120/4840 cut-off events. For 163262/163283 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26258 event pairs, 800 based on Foata normal form. 18/4855 useless extension candidates. Maximal degree in co-relation 34060. Up to 4017 conditions per place. [2024-06-20 15:50:40,451 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 210 selfloop transitions, 135 changer transitions 0/351 dead transitions. [2024-06-20 15:50:40,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 351 transitions, 5031 flow [2024-06-20 15:50:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:50:40,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:50:40,453 INFO L175 Difference]: Start difference. First operand has 161 places, 295 transitions, 3753 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:50:40,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 351 transitions, 5031 flow [2024-06-20 15:50:40,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 351 transitions, 4949 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 15:50:40,607 INFO L231 Difference]: Finished difference. Result has 170 places, 318 transitions, 4312 flow [2024-06-20 15:50:40,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3671, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=170, PETRI_TRANSITIONS=318} [2024-06-20 15:50:40,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-20 15:50:40,608 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 318 transitions, 4312 flow [2024-06-20 15:50:40,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:40,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:40,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:40,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:50:40,608 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:40,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -356882443, now seen corresponding path program 5 times [2024-06-20 15:50:40,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:40,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919990770] [2024-06-20 15:50:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919990770] [2024-06-20 15:50:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919990770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681144236] [2024-06-20 15:50:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:41,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:41,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 318 transitions, 4312 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:41,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:41,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:41,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:42,578 INFO L124 PetriNetUnfolderBase]: 2991/4735 cut-off events. [2024-06-20 15:50:42,579 INFO L125 PetriNetUnfolderBase]: For 175791/175798 co-relation queries the response was YES. [2024-06-20 15:50:42,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34621 conditions, 4735 events. 2991/4735 cut-off events. For 175791/175798 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26483 event pairs, 750 based on Foata normal form. 12/4744 useless extension candidates. Maximal degree in co-relation 34543. Up to 4004 conditions per place. [2024-06-20 15:50:42,615 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 241 selfloop transitions, 76 changer transitions 0/353 dead transitions. [2024-06-20 15:50:42,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 353 transitions, 5150 flow [2024-06-20 15:50:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:50:42,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-20 15:50:42,617 INFO L175 Difference]: Start difference. First operand has 170 places, 318 transitions, 4312 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:50:42,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 353 transitions, 5150 flow [2024-06-20 15:50:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 353 transitions, 4949 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 15:50:42,813 INFO L231 Difference]: Finished difference. Result has 175 places, 322 transitions, 4369 flow [2024-06-20 15:50:42,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4369, PETRI_PLACES=175, PETRI_TRANSITIONS=322} [2024-06-20 15:50:42,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-20 15:50:42,814 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 322 transitions, 4369 flow [2024-06-20 15:50:42,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:42,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:42,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:50:42,814 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:42,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1698790491, now seen corresponding path program 3 times [2024-06-20 15:50:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911045904] [2024-06-20 15:50:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:43,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:43,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911045904] [2024-06-20 15:50:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911045904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:43,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127241261] [2024-06-20 15:50:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:44,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:44,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 322 transitions, 4369 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:44,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:44,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:44,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:45,315 INFO L124 PetriNetUnfolderBase]: 3188/4948 cut-off events. [2024-06-20 15:50:45,315 INFO L125 PetriNetUnfolderBase]: For 182447/182458 co-relation queries the response was YES. [2024-06-20 15:50:45,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36331 conditions, 4948 events. 3188/4948 cut-off events. For 182447/182458 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27021 event pairs, 823 based on Foata normal form. 11/4956 useless extension candidates. Maximal degree in co-relation 36251. Up to 4301 conditions per place. [2024-06-20 15:50:45,366 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 253 selfloop transitions, 116 changer transitions 0/375 dead transitions. [2024-06-20 15:50:45,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 375 transitions, 5659 flow [2024-06-20 15:50:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:50:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:50:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 15:50:45,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-20 15:50:45,368 INFO L175 Difference]: Start difference. First operand has 175 places, 322 transitions, 4369 flow. Second operand 10 states and 202 transitions. [2024-06-20 15:50:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 375 transitions, 5659 flow [2024-06-20 15:50:45,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 375 transitions, 5455 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 15:50:45,680 INFO L231 Difference]: Finished difference. Result has 178 places, 338 transitions, 4725 flow [2024-06-20 15:50:45,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4725, PETRI_PLACES=178, PETRI_TRANSITIONS=338} [2024-06-20 15:50:45,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-20 15:50:45,681 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 338 transitions, 4725 flow [2024-06-20 15:50:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:45,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:45,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:50:45,682 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:50:45,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1133460117, now seen corresponding path program 1 times [2024-06-20 15:50:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533536880] [2024-06-20 15:50:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:46,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533536880] [2024-06-20 15:50:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533536880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:46,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:46,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83977781] [2024-06-20 15:50:46,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:46,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:46,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:46,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 338 transitions, 4725 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:46,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:46,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:46,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:47,648 INFO L124 PetriNetUnfolderBase]: 3230/5006 cut-off events. [2024-06-20 15:50:47,649 INFO L125 PetriNetUnfolderBase]: For 194699/194710 co-relation queries the response was YES. [2024-06-20 15:50:47,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 5006 events. 3230/5006 cut-off events. For 194699/194710 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 27367 event pairs, 830 based on Foata normal form. 12/5015 useless extension candidates. Maximal degree in co-relation 37183. Up to 4133 conditions per place. [2024-06-20 15:50:47,689 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 269 selfloop transitions, 114 changer transitions 0/389 dead transitions. [2024-06-20 15:50:47,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 389 transitions, 6095 flow [2024-06-20 15:50:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-20 15:50:47,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-20 15:50:47,691 INFO L175 Difference]: Start difference. First operand has 178 places, 338 transitions, 4725 flow. Second operand 9 states and 192 transitions. [2024-06-20 15:50:47,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 389 transitions, 6095 flow [2024-06-20 15:50:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 389 transitions, 5935 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:47,980 INFO L231 Difference]: Finished difference. Result has 182 places, 348 transitions, 4996 flow [2024-06-20 15:50:47,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4996, PETRI_PLACES=182, PETRI_TRANSITIONS=348} [2024-06-20 15:50:47,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-20 15:50:47,981 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 348 transitions, 4996 flow [2024-06-20 15:50:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:47,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:47,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:47,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:50:47,981 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)] === [2024-06-20 15:50:47,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1698606165, now seen corresponding path program 2 times [2024-06-20 15:50:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:47,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77508017] [2024-06-20 15:50:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:48,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77508017] [2024-06-20 15:50:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77508017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:48,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:48,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946286289] [2024-06-20 15:50:48,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:48,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:48,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 348 transitions, 4996 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:48,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:48,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:48,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:49,933 INFO L124 PetriNetUnfolderBase]: 3334/5167 cut-off events. [2024-06-20 15:50:49,934 INFO L125 PetriNetUnfolderBase]: For 210591/210606 co-relation queries the response was YES. [2024-06-20 15:50:49,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39446 conditions, 5167 events. 3334/5167 cut-off events. For 210591/210606 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28399 event pairs, 816 based on Foata normal form. 16/5180 useless extension candidates. Maximal degree in co-relation 39362. Up to 4215 conditions per place. [2024-06-20 15:50:49,989 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 274 selfloop transitions, 124 changer transitions 0/404 dead transitions. [2024-06-20 15:50:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 404 transitions, 6535 flow [2024-06-20 15:50:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-20 15:50:49,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-20 15:50:49,991 INFO L175 Difference]: Start difference. First operand has 182 places, 348 transitions, 4996 flow. Second operand 9 states and 190 transitions. [2024-06-20 15:50:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 404 transitions, 6535 flow [2024-06-20 15:50:50,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 404 transitions, 6345 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:50,442 INFO L231 Difference]: Finished difference. Result has 187 places, 364 transitions, 5348 flow [2024-06-20 15:50:50,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5348, PETRI_PLACES=187, PETRI_TRANSITIONS=364} [2024-06-20 15:50:50,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-20 15:50:50,443 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 364 transitions, 5348 flow [2024-06-20 15:50:50,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:50,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:50,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:50,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:50:50,443 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)] === [2024-06-20 15:50:50,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1133632911, now seen corresponding path program 4 times [2024-06-20 15:50:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:50,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320045657] [2024-06-20 15:50:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:50,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:51,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:51,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320045657] [2024-06-20 15:50:51,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320045657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:51,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:51,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:51,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518834019] [2024-06-20 15:50:51,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:51,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:51,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:51,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:51,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:51,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 364 transitions, 5348 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:51,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:51,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:51,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:53,002 INFO L124 PetriNetUnfolderBase]: 3336/5176 cut-off events. [2024-06-20 15:50:53,003 INFO L125 PetriNetUnfolderBase]: For 221218/221233 co-relation queries the response was YES. [2024-06-20 15:50:53,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39916 conditions, 5176 events. 3336/5176 cut-off events. For 221218/221233 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28458 event pairs, 833 based on Foata normal form. 15/5188 useless extension candidates. Maximal degree in co-relation 39830. Up to 4564 conditions per place. [2024-06-20 15:50:53,046 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 291 selfloop transitions, 98 changer transitions 0/395 dead transitions. [2024-06-20 15:50:53,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 395 transitions, 6292 flow [2024-06-20 15:50:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:50:53,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:50:53,047 INFO L175 Difference]: Start difference. First operand has 187 places, 364 transitions, 5348 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:50:53,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 395 transitions, 6292 flow [2024-06-20 15:50:53,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 395 transitions, 6066 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:50:53,380 INFO L231 Difference]: Finished difference. Result has 191 places, 367 transitions, 5387 flow [2024-06-20 15:50:53,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5387, PETRI_PLACES=191, PETRI_TRANSITIONS=367} [2024-06-20 15:50:53,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-20 15:50:53,381 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 367 transitions, 5387 flow [2024-06-20 15:50:53,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:53,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:53,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:53,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:50:53,381 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)] === [2024-06-20 15:50:53,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1133633097, now seen corresponding path program 3 times [2024-06-20 15:50:53,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:53,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248870022] [2024-06-20 15:50:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:54,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248870022] [2024-06-20 15:50:54,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248870022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:54,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:54,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557459984] [2024-06-20 15:50:54,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:54,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:50:54,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 367 transitions, 5387 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:54,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:54,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:50:54,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:55,498 INFO L124 PetriNetUnfolderBase]: 3326/5156 cut-off events. [2024-06-20 15:50:55,498 INFO L125 PetriNetUnfolderBase]: For 230344/230359 co-relation queries the response was YES. [2024-06-20 15:50:55,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 5156 events. 3326/5156 cut-off events. For 230344/230359 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28363 event pairs, 814 based on Foata normal form. 16/5169 useless extension candidates. Maximal degree in co-relation 39645. Up to 4210 conditions per place. [2024-06-20 15:50:55,553 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 279 selfloop transitions, 122 changer transitions 0/407 dead transitions. [2024-06-20 15:50:55,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 407 transitions, 6636 flow [2024-06-20 15:50:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:50:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:50:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-20 15:50:55,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935400516795866 [2024-06-20 15:50:55,555 INFO L175 Difference]: Start difference. First operand has 191 places, 367 transitions, 5387 flow. Second operand 9 states and 191 transitions. [2024-06-20 15:50:55,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 407 transitions, 6636 flow [2024-06-20 15:50:56,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 407 transitions, 6403 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 15:50:56,063 INFO L231 Difference]: Finished difference. Result has 193 places, 367 transitions, 5406 flow [2024-06-20 15:50:56,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5154, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5406, PETRI_PLACES=193, PETRI_TRANSITIONS=367} [2024-06-20 15:50:56,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-20 15:50:56,064 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 367 transitions, 5406 flow [2024-06-20 15:50:56,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:50:56,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:56,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:56,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:50:56,064 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)] === [2024-06-20 15:50:56,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1477548617, now seen corresponding path program 1 times [2024-06-20 15:50:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:56,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755790378] [2024-06-20 15:50:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:56,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755790378] [2024-06-20 15:50:56,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755790378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:56,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:50:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364859828] [2024-06-20 15:50:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:50:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:50:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:50:56,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:50:56,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 367 transitions, 5406 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:50:56,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:56,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:50:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:50:57,909 INFO L124 PetriNetUnfolderBase]: 3877/5859 cut-off events. [2024-06-20 15:50:57,910 INFO L125 PetriNetUnfolderBase]: For 275154/275159 co-relation queries the response was YES. [2024-06-20 15:50:57,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44905 conditions, 5859 events. 3877/5859 cut-off events. For 275154/275159 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30913 event pairs, 1399 based on Foata normal form. 6/5859 useless extension candidates. Maximal degree in co-relation 44817. Up to 5568 conditions per place. [2024-06-20 15:50:57,972 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 21 changer transitions 0/393 dead transitions. [2024-06-20 15:50:57,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 393 transitions, 6382 flow [2024-06-20 15:50:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:50:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:50:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 15:50:57,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-20 15:50:57,974 INFO L175 Difference]: Start difference. First operand has 193 places, 367 transitions, 5406 flow. Second operand 7 states and 128 transitions. [2024-06-20 15:50:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 393 transitions, 6382 flow [2024-06-20 15:50:58,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 393 transitions, 6146 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:50:58,446 INFO L231 Difference]: Finished difference. Result has 195 places, 375 transitions, 5366 flow [2024-06-20 15:50:58,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5366, PETRI_PLACES=195, PETRI_TRANSITIONS=375} [2024-06-20 15:50:58,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-20 15:50:58,446 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 375 transitions, 5366 flow [2024-06-20 15:50:58,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:50:58,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:50:58,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:50:58,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:50:58,447 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)] === [2024-06-20 15:50:58,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:50:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1146283637, now seen corresponding path program 6 times [2024-06-20 15:50:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:50:58,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413167576] [2024-06-20 15:50:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:50:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:50:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:50:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:50:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:50:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413167576] [2024-06-20 15:50:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413167576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:50:59,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:50:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:50:59,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191870704] [2024-06-20 15:50:59,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:50:59,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:50:59,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:50:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:50:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:50:59,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:50:59,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 375 transitions, 5366 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:50:59,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:50:59,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:50:59,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:00,649 INFO L124 PetriNetUnfolderBase]: 3433/5367 cut-off events. [2024-06-20 15:51:00,649 INFO L125 PetriNetUnfolderBase]: For 274252/274292 co-relation queries the response was YES. [2024-06-20 15:51:00,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42770 conditions, 5367 events. 3433/5367 cut-off events. For 274252/274292 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30446 event pairs, 1144 based on Foata normal form. 29/5340 useless extension candidates. Maximal degree in co-relation 42680. Up to 4488 conditions per place. [2024-06-20 15:51:00,706 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 320 selfloop transitions, 94 changer transitions 0/456 dead transitions. [2024-06-20 15:51:00,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 456 transitions, 7380 flow [2024-06-20 15:51:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:51:00,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 15:51:00,707 INFO L175 Difference]: Start difference. First operand has 195 places, 375 transitions, 5366 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:51:00,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 456 transitions, 7380 flow [2024-06-20 15:51:01,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 456 transitions, 7331 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 15:51:01,110 INFO L231 Difference]: Finished difference. Result has 205 places, 420 transitions, 6492 flow [2024-06-20 15:51:01,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6492, PETRI_PLACES=205, PETRI_TRANSITIONS=420} [2024-06-20 15:51:01,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-20 15:51:01,111 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 420 transitions, 6492 flow [2024-06-20 15:51:01,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:01,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:01,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:01,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:51:01,111 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)] === [2024-06-20 15:51:01,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 836935055, now seen corresponding path program 7 times [2024-06-20 15:51:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:01,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543708461] [2024-06-20 15:51:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:02,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543708461] [2024-06-20 15:51:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543708461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:02,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:02,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028098991] [2024-06-20 15:51:02,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:02,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 15:51:02,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 420 transitions, 6492 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:02,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:02,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 15:51:02,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:03,382 INFO L124 PetriNetUnfolderBase]: 3408/5343 cut-off events. [2024-06-20 15:51:03,382 INFO L125 PetriNetUnfolderBase]: For 279225/279268 co-relation queries the response was YES. [2024-06-20 15:51:03,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43397 conditions, 5343 events. 3408/5343 cut-off events. For 279225/279268 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30332 event pairs, 935 based on Foata normal form. 28/5345 useless extension candidates. Maximal degree in co-relation 43302. Up to 4423 conditions per place. [2024-06-20 15:51:03,442 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 132 changer transitions 0/454 dead transitions. [2024-06-20 15:51:03,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 454 transitions, 7488 flow [2024-06-20 15:51:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:51:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:51:03,444 INFO L175 Difference]: Start difference. First operand has 205 places, 420 transitions, 6492 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:51:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 454 transitions, 7488 flow [2024-06-20 15:51:04,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 454 transitions, 7326 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 15:51:04,220 INFO L231 Difference]: Finished difference. Result has 210 places, 420 transitions, 6631 flow [2024-06-20 15:51:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6631, PETRI_PLACES=210, PETRI_TRANSITIONS=420} [2024-06-20 15:51:04,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-20 15:51:04,221 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 420 transitions, 6631 flow [2024-06-20 15:51:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:04,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:51:04,221 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)] === [2024-06-20 15:51:04,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash -512446572, now seen corresponding path program 1 times [2024-06-20 15:51:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096552708] [2024-06-20 15:51:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:05,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096552708] [2024-06-20 15:51:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096552708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:51:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146392301] [2024-06-20 15:51:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:05,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:51:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:51:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:51:05,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:05,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 420 transitions, 6631 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:05,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:06,785 INFO L124 PetriNetUnfolderBase]: 3591/5570 cut-off events. [2024-06-20 15:51:06,786 INFO L125 PetriNetUnfolderBase]: For 285900/285923 co-relation queries the response was YES. [2024-06-20 15:51:06,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45120 conditions, 5570 events. 3591/5570 cut-off events. For 285900/285923 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31225 event pairs, 1041 based on Foata normal form. 14/5571 useless extension candidates. Maximal degree in co-relation 45024. Up to 4222 conditions per place. [2024-06-20 15:51:06,848 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 291 selfloop transitions, 186 changer transitions 0/485 dead transitions. [2024-06-20 15:51:06,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 485 transitions, 8307 flow [2024-06-20 15:51:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:51:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:51:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-20 15:51:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47227191413237923 [2024-06-20 15:51:06,850 INFO L175 Difference]: Start difference. First operand has 210 places, 420 transitions, 6631 flow. Second operand 13 states and 264 transitions. [2024-06-20 15:51:06,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 485 transitions, 8307 flow [2024-06-20 15:51:07,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 485 transitions, 8032 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:07,417 INFO L231 Difference]: Finished difference. Result has 216 places, 426 transitions, 6849 flow [2024-06-20 15:51:07,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6849, PETRI_PLACES=216, PETRI_TRANSITIONS=426} [2024-06-20 15:51:07,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-20 15:51:07,418 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 426 transitions, 6849 flow [2024-06-20 15:51:07,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:07,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:07,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:07,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:51:07,419 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)] === [2024-06-20 15:51:07,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1146223063, now seen corresponding path program 5 times [2024-06-20 15:51:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562861182] [2024-06-20 15:51:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562861182] [2024-06-20 15:51:08,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562861182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:08,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:08,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178521740] [2024-06-20 15:51:08,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:08,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:08,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:08,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:08,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:08,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 426 transitions, 6849 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:08,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:08,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:08,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:09,666 INFO L124 PetriNetUnfolderBase]: 3670/5684 cut-off events. [2024-06-20 15:51:09,667 INFO L125 PetriNetUnfolderBase]: For 277836/277864 co-relation queries the response was YES. [2024-06-20 15:51:09,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46411 conditions, 5684 events. 3670/5684 cut-off events. For 277836/277864 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31881 event pairs, 976 based on Foata normal form. 15/5686 useless extension candidates. Maximal degree in co-relation 46314. Up to 4665 conditions per place. [2024-06-20 15:51:09,719 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 278 selfloop transitions, 198 changer transitions 0/484 dead transitions. [2024-06-20 15:51:09,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 484 transitions, 8550 flow [2024-06-20 15:51:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 15:51:09,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-20 15:51:09,729 INFO L175 Difference]: Start difference. First operand has 216 places, 426 transitions, 6849 flow. Second operand 8 states and 163 transitions. [2024-06-20 15:51:09,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 484 transitions, 8550 flow [2024-06-20 15:51:10,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 484 transitions, 8342 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:10,251 INFO L231 Difference]: Finished difference. Result has 217 places, 453 transitions, 7564 flow [2024-06-20 15:51:10,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7564, PETRI_PLACES=217, PETRI_TRANSITIONS=453} [2024-06-20 15:51:10,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-20 15:51:10,252 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 453 transitions, 7564 flow [2024-06-20 15:51:10,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:10,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:10,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:51:10,254 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)] === [2024-06-20 15:51:10,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash -378788017, now seen corresponding path program 6 times [2024-06-20 15:51:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563417020] [2024-06-20 15:51:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:11,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563417020] [2024-06-20 15:51:11,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563417020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:11,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:11,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576023037] [2024-06-20 15:51:11,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:11,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 453 transitions, 7564 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:11,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:12,534 INFO L124 PetriNetUnfolderBase]: 3713/5747 cut-off events. [2024-06-20 15:51:12,534 INFO L125 PetriNetUnfolderBase]: For 291460/291483 co-relation queries the response was YES. [2024-06-20 15:51:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47826 conditions, 5747 events. 3713/5747 cut-off events. For 291460/291483 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32289 event pairs, 1042 based on Foata normal form. 14/5748 useless extension candidates. Maximal degree in co-relation 47726. Up to 5060 conditions per place. [2024-06-20 15:51:12,586 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 366 selfloop transitions, 120 changer transitions 0/494 dead transitions. [2024-06-20 15:51:12,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 494 transitions, 8909 flow [2024-06-20 15:51:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:51:12,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:51:12,588 INFO L175 Difference]: Start difference. First operand has 217 places, 453 transitions, 7564 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:51:12,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 494 transitions, 8909 flow [2024-06-20 15:51:13,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 494 transitions, 8585 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:13,156 INFO L231 Difference]: Finished difference. Result has 220 places, 468 transitions, 7762 flow [2024-06-20 15:51:13,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7762, PETRI_PLACES=220, PETRI_TRANSITIONS=468} [2024-06-20 15:51:13,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-20 15:51:13,156 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 468 transitions, 7762 flow [2024-06-20 15:51:13,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:13,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:13,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:13,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:51:13,157 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:13,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -378792667, now seen corresponding path program 7 times [2024-06-20 15:51:13,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:13,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265203447] [2024-06-20 15:51:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265203447] [2024-06-20 15:51:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265203447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:14,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027378468] [2024-06-20 15:51:14,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 468 transitions, 7762 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:15,510 INFO L124 PetriNetUnfolderBase]: 3738/5786 cut-off events. [2024-06-20 15:51:15,511 INFO L125 PetriNetUnfolderBase]: For 292054/292077 co-relation queries the response was YES. [2024-06-20 15:51:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48020 conditions, 5786 events. 3738/5786 cut-off events. For 292054/292077 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32590 event pairs, 1036 based on Foata normal form. 14/5787 useless extension candidates. Maximal degree in co-relation 47920. Up to 5028 conditions per place. [2024-06-20 15:51:15,572 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 347 selfloop transitions, 153 changer transitions 0/508 dead transitions. [2024-06-20 15:51:15,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 508 transitions, 9108 flow [2024-06-20 15:51:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:51:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:51:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:51:15,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-20 15:51:15,574 INFO L175 Difference]: Start difference. First operand has 220 places, 468 transitions, 7762 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:51:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 508 transitions, 9108 flow [2024-06-20 15:51:16,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 508 transitions, 8811 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:16,239 INFO L231 Difference]: Finished difference. Result has 223 places, 477 transitions, 8003 flow [2024-06-20 15:51:16,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7465, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8003, PETRI_PLACES=223, PETRI_TRANSITIONS=477} [2024-06-20 15:51:16,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-20 15:51:16,240 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 477 transitions, 8003 flow [2024-06-20 15:51:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:16,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:16,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:16,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:51:16,241 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash 955022859, now seen corresponding path program 8 times [2024-06-20 15:51:16,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:16,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172384751] [2024-06-20 15:51:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172384751] [2024-06-20 15:51:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172384751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:17,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:17,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:17,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855940104] [2024-06-20 15:51:17,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:17,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:17,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:17,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:17,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 477 transitions, 8003 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:17,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:17,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:17,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:18,476 INFO L124 PetriNetUnfolderBase]: 3789/5845 cut-off events. [2024-06-20 15:51:18,476 INFO L125 PetriNetUnfolderBase]: For 305768/305793 co-relation queries the response was YES. [2024-06-20 15:51:18,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49115 conditions, 5845 events. 3789/5845 cut-off events. For 305768/305793 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32848 event pairs, 977 based on Foata normal form. 16/5848 useless extension candidates. Maximal degree in co-relation 49014. Up to 5002 conditions per place. [2024-06-20 15:51:18,546 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 341 selfloop transitions, 178 changer transitions 0/527 dead transitions. [2024-06-20 15:51:18,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 527 transitions, 9651 flow [2024-06-20 15:51:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-20 15:51:18,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:51:18,548 INFO L175 Difference]: Start difference. First operand has 223 places, 477 transitions, 8003 flow. Second operand 8 states and 168 transitions. [2024-06-20 15:51:18,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 527 transitions, 9651 flow [2024-06-20 15:51:19,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 527 transitions, 9195 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:19,252 INFO L231 Difference]: Finished difference. Result has 223 places, 492 transitions, 8194 flow [2024-06-20 15:51:19,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7569, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8194, PETRI_PLACES=223, PETRI_TRANSITIONS=492} [2024-06-20 15:51:19,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-20 15:51:19,253 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 492 transitions, 8194 flow [2024-06-20 15:51:19,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:19,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:19,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:51:19,254 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)] === [2024-06-20 15:51:19,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash 955207185, now seen corresponding path program 4 times [2024-06-20 15:51:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631202061] [2024-06-20 15:51:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:20,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631202061] [2024-06-20 15:51:20,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631202061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:20,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:20,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:20,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076921597] [2024-06-20 15:51:20,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:20,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:20,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:20,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:20,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 492 transitions, 8194 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:20,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:20,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:20,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:21,539 INFO L124 PetriNetUnfolderBase]: 3903/6026 cut-off events. [2024-06-20 15:51:21,539 INFO L125 PetriNetUnfolderBase]: For 317780/317803 co-relation queries the response was YES. [2024-06-20 15:51:21,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50606 conditions, 6026 events. 3903/6026 cut-off events. For 317780/317803 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34158 event pairs, 1028 based on Foata normal form. 18/6031 useless extension candidates. Maximal degree in co-relation 50505. Up to 4867 conditions per place. [2024-06-20 15:51:21,602 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 363 selfloop transitions, 179 changer transitions 0/550 dead transitions. [2024-06-20 15:51:21,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 550 transitions, 10229 flow [2024-06-20 15:51:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:51:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-20 15:51:21,603 INFO L175 Difference]: Start difference. First operand has 223 places, 492 transitions, 8194 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:51:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 550 transitions, 10229 flow [2024-06-20 15:51:22,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 550 transitions, 9747 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:22,399 INFO L231 Difference]: Finished difference. Result has 225 places, 514 transitions, 8553 flow [2024-06-20 15:51:22,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8553, PETRI_PLACES=225, PETRI_TRANSITIONS=514} [2024-06-20 15:51:22,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-20 15:51:22,400 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 514 transitions, 8553 flow [2024-06-20 15:51:22,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:22,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:22,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:22,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:51:22,400 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)] === [2024-06-20 15:51:22,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 955027695, now seen corresponding path program 5 times [2024-06-20 15:51:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:22,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797210475] [2024-06-20 15:51:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:23,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:23,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797210475] [2024-06-20 15:51:23,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797210475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:23,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494239362] [2024-06-20 15:51:23,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:23,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:23,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:23,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:23,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 514 transitions, 8553 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:23,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:23,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:23,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:24,575 INFO L124 PetriNetUnfolderBase]: 3943/6085 cut-off events. [2024-06-20 15:51:24,575 INFO L125 PetriNetUnfolderBase]: For 334196/334218 co-relation queries the response was YES. [2024-06-20 15:51:24,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51495 conditions, 6085 events. 3943/6085 cut-off events. For 334196/334218 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34625 event pairs, 1057 based on Foata normal form. 18/6088 useless extension candidates. Maximal degree in co-relation 51393. Up to 4908 conditions per place. [2024-06-20 15:51:24,642 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 193 changer transitions 0/560 dead transitions. [2024-06-20 15:51:24,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 560 transitions, 10226 flow [2024-06-20 15:51:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-20 15:51:24,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-20 15:51:24,644 INFO L175 Difference]: Start difference. First operand has 225 places, 514 transitions, 8553 flow. Second operand 8 states and 169 transitions. [2024-06-20 15:51:24,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 560 transitions, 10226 flow [2024-06-20 15:51:25,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 560 transitions, 9770 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:25,438 INFO L231 Difference]: Finished difference. Result has 228 places, 522 transitions, 8691 flow [2024-06-20 15:51:25,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8139, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8691, PETRI_PLACES=228, PETRI_TRANSITIONS=522} [2024-06-20 15:51:25,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-20 15:51:25,438 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 522 transitions, 8691 flow [2024-06-20 15:51:25,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:25,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:25,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:51:25,439 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)] === [2024-06-20 15:51:25,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 955027509, now seen corresponding path program 9 times [2024-06-20 15:51:25,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014439996] [2024-06-20 15:51:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:26,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014439996] [2024-06-20 15:51:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014439996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:26,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:26,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:26,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492716466] [2024-06-20 15:51:26,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:26,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:26,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:26,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:26,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 522 transitions, 8691 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:26,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:26,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:26,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:27,899 INFO L124 PetriNetUnfolderBase]: 3968/6121 cut-off events. [2024-06-20 15:51:27,899 INFO L125 PetriNetUnfolderBase]: For 331057/331079 co-relation queries the response was YES. [2024-06-20 15:51:27,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51571 conditions, 6121 events. 3968/6121 cut-off events. For 331057/331079 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34793 event pairs, 1070 based on Foata normal form. 14/6120 useless extension candidates. Maximal degree in co-relation 51469. Up to 5426 conditions per place. [2024-06-20 15:51:27,958 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 425 selfloop transitions, 127 changer transitions 0/560 dead transitions. [2024-06-20 15:51:27,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 560 transitions, 10132 flow [2024-06-20 15:51:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:51:27,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:51:27,960 INFO L175 Difference]: Start difference. First operand has 228 places, 522 transitions, 8691 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:51:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 560 transitions, 10132 flow [2024-06-20 15:51:28,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 560 transitions, 9646 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:28,715 INFO L231 Difference]: Finished difference. Result has 229 places, 531 transitions, 8670 flow [2024-06-20 15:51:28,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8205, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8670, PETRI_PLACES=229, PETRI_TRANSITIONS=531} [2024-06-20 15:51:28,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-20 15:51:28,716 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 531 transitions, 8670 flow [2024-06-20 15:51:28,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:28,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:28,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:28,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:51:28,717 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)] === [2024-06-20 15:51:28,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -263323681, now seen corresponding path program 6 times [2024-06-20 15:51:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642156566] [2024-06-20 15:51:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:29,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642156566] [2024-06-20 15:51:29,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642156566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:29,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:29,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006251476] [2024-06-20 15:51:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:29,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:29,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 531 transitions, 8670 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:29,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:29,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:30,877 INFO L124 PetriNetUnfolderBase]: 3936/6090 cut-off events. [2024-06-20 15:51:30,877 INFO L125 PetriNetUnfolderBase]: For 322216/322239 co-relation queries the response was YES. [2024-06-20 15:51:30,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50496 conditions, 6090 events. 3936/6090 cut-off events. For 322216/322239 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34716 event pairs, 1024 based on Foata normal form. 18/6095 useless extension candidates. Maximal degree in co-relation 50394. Up to 4912 conditions per place. [2024-06-20 15:51:30,943 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 378 selfloop transitions, 183 changer transitions 0/569 dead transitions. [2024-06-20 15:51:30,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 569 transitions, 10174 flow [2024-06-20 15:51:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:51:30,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-20 15:51:30,945 INFO L175 Difference]: Start difference. First operand has 229 places, 531 transitions, 8670 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:51:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 569 transitions, 10174 flow [2024-06-20 15:51:31,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 569 transitions, 9769 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:31,775 INFO L231 Difference]: Finished difference. Result has 231 places, 531 transitions, 8653 flow [2024-06-20 15:51:31,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8653, PETRI_PLACES=231, PETRI_TRANSITIONS=531} [2024-06-20 15:51:31,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 15:51:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 531 transitions, 8653 flow [2024-06-20 15:51:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:31,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:31,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:51:31,777 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)] === [2024-06-20 15:51:31,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -263323867, now seen corresponding path program 10 times [2024-06-20 15:51:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899667270] [2024-06-20 15:51:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:32,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:32,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899667270] [2024-06-20 15:51:32,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899667270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:32,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807879237] [2024-06-20 15:51:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:32,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:33,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:33,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 531 transitions, 8653 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:33,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:33,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:33,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:34,177 INFO L124 PetriNetUnfolderBase]: 3968/6135 cut-off events. [2024-06-20 15:51:34,177 INFO L125 PetriNetUnfolderBase]: For 333553/333576 co-relation queries the response was YES. [2024-06-20 15:51:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51378 conditions, 6135 events. 3968/6135 cut-off events. For 333553/333576 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34962 event pairs, 1057 based on Foata normal form. 15/6137 useless extension candidates. Maximal degree in co-relation 51275. Up to 5426 conditions per place. [2024-06-20 15:51:34,248 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 124 changer transitions 0/569 dead transitions. [2024-06-20 15:51:34,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 569 transitions, 10164 flow [2024-06-20 15:51:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:51:34,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:51:34,250 INFO L175 Difference]: Start difference. First operand has 231 places, 531 transitions, 8653 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:51:34,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 569 transitions, 10164 flow [2024-06-20 15:51:35,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 569 transitions, 9791 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:51:35,139 INFO L231 Difference]: Finished difference. Result has 232 places, 543 transitions, 8831 flow [2024-06-20 15:51:35,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8831, PETRI_PLACES=232, PETRI_TRANSITIONS=543} [2024-06-20 15:51:35,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-20 15:51:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 543 transitions, 8831 flow [2024-06-20 15:51:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:35,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:35,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:35,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:51:35,140 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -445630979, now seen corresponding path program 2 times [2024-06-20 15:51:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:35,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582185394] [2024-06-20 15:51:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:35,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:35,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582185394] [2024-06-20 15:51:35,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582185394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:35,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:35,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:51:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480650145] [2024-06-20 15:51:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:51:35,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:51:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:51:35,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:51:35,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 543 transitions, 8831 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:51:35,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:35,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:51:35,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:37,144 INFO L124 PetriNetUnfolderBase]: 4569/6895 cut-off events. [2024-06-20 15:51:37,144 INFO L125 PetriNetUnfolderBase]: For 372526/372537 co-relation queries the response was YES. [2024-06-20 15:51:37,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56195 conditions, 6895 events. 4569/6895 cut-off events. For 372526/372537 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37694 event pairs, 1534 based on Foata normal form. 12/6897 useless extension candidates. Maximal degree in co-relation 56092. Up to 6503 conditions per place. [2024-06-20 15:51:37,234 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 475 selfloop transitions, 24 changer transitions 0/560 dead transitions. [2024-06-20 15:51:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 560 transitions, 10014 flow [2024-06-20 15:51:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:51:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:51:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 15:51:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:51:37,235 INFO L175 Difference]: Start difference. First operand has 232 places, 543 transitions, 8831 flow. Second operand 6 states and 111 transitions. [2024-06-20 15:51:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 560 transitions, 10014 flow [2024-06-20 15:51:38,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 560 transitions, 9648 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:38,041 INFO L231 Difference]: Finished difference. Result has 232 places, 546 transitions, 8575 flow [2024-06-20 15:51:38,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8575, PETRI_PLACES=232, PETRI_TRANSITIONS=546} [2024-06-20 15:51:38,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-20 15:51:38,042 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 546 transitions, 8575 flow [2024-06-20 15:51:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:51:38,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:38,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:51:38,042 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:38,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1919609759, now seen corresponding path program 7 times [2024-06-20 15:51:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802436612] [2024-06-20 15:51:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:38,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802436612] [2024-06-20 15:51:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802436612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:38,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:38,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92064339] [2024-06-20 15:51:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:38,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:38,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 546 transitions, 8575 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:38,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:38,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:38,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:40,310 INFO L124 PetriNetUnfolderBase]: 4041/6240 cut-off events. [2024-06-20 15:51:40,310 INFO L125 PetriNetUnfolderBase]: For 344384/344401 co-relation queries the response was YES. [2024-06-20 15:51:40,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51579 conditions, 6240 events. 4041/6240 cut-off events. For 344384/344401 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35653 event pairs, 1350 based on Foata normal form. 10/6226 useless extension candidates. Maximal degree in co-relation 51475. Up to 5694 conditions per place. [2024-06-20 15:51:40,378 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 521 selfloop transitions, 62 changer transitions 0/592 dead transitions. [2024-06-20 15:51:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 592 transitions, 10364 flow [2024-06-20 15:51:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:51:40,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:51:40,380 INFO L175 Difference]: Start difference. First operand has 232 places, 546 transitions, 8575 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:51:40,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 592 transitions, 10364 flow [2024-06-20 15:51:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 592 transitions, 10295 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 15:51:41,126 INFO L231 Difference]: Finished difference. Result has 236 places, 557 transitions, 8901 flow [2024-06-20 15:51:41,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8508, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8901, PETRI_PLACES=236, PETRI_TRANSITIONS=557} [2024-06-20 15:51:41,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-20 15:51:41,127 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 557 transitions, 8901 flow [2024-06-20 15:51:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:41,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:41,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:41,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:51:41,128 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)] === [2024-06-20 15:51:41,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1420692657, now seen corresponding path program 1 times [2024-06-20 15:51:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198635134] [2024-06-20 15:51:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:41,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198635134] [2024-06-20 15:51:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198635134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:41,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:41,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975802645] [2024-06-20 15:51:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:41,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:41,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:51:41,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 557 transitions, 8901 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:51:41,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:41,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:51:41,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:43,347 INFO L124 PetriNetUnfolderBase]: 4665/7038 cut-off events. [2024-06-20 15:51:43,348 INFO L125 PetriNetUnfolderBase]: For 381658/381673 co-relation queries the response was YES. [2024-06-20 15:51:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57127 conditions, 7038 events. 4665/7038 cut-off events. For 381658/381673 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38462 event pairs, 1556 based on Foata normal form. 18/7046 useless extension candidates. Maximal degree in co-relation 57023. Up to 6621 conditions per place. [2024-06-20 15:51:43,436 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 493 selfloop transitions, 31 changer transitions 0/585 dead transitions. [2024-06-20 15:51:43,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 585 transitions, 10193 flow [2024-06-20 15:51:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:51:43,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-20 15:51:43,437 INFO L175 Difference]: Start difference. First operand has 236 places, 557 transitions, 8901 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:51:43,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 585 transitions, 10193 flow [2024-06-20 15:51:44,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 585 transitions, 9682 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-20 15:51:44,242 INFO L231 Difference]: Finished difference. Result has 236 places, 566 transitions, 8578 flow [2024-06-20 15:51:44,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8390, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8578, PETRI_PLACES=236, PETRI_TRANSITIONS=566} [2024-06-20 15:51:44,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-20 15:51:44,258 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 566 transitions, 8578 flow [2024-06-20 15:51:44,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:51:44,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:44,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:51:44,258 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:44,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1919616269, now seen corresponding path program 8 times [2024-06-20 15:51:44,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:44,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911256663] [2024-06-20 15:51:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:44,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:45,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911256663] [2024-06-20 15:51:45,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911256663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:45,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:45,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493180516] [2024-06-20 15:51:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:45,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:45,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 566 transitions, 8578 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:45,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:45,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:45,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:46,453 INFO L124 PetriNetUnfolderBase]: 4120/6355 cut-off events. [2024-06-20 15:51:46,454 INFO L125 PetriNetUnfolderBase]: For 354765/354781 co-relation queries the response was YES. [2024-06-20 15:51:46,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52921 conditions, 6355 events. 4120/6355 cut-off events. For 354765/354781 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36381 event pairs, 1370 based on Foata normal form. 10/6341 useless extension candidates. Maximal degree in co-relation 52815. Up to 5780 conditions per place. [2024-06-20 15:51:46,532 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 531 selfloop transitions, 71 changer transitions 0/611 dead transitions. [2024-06-20 15:51:46,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 611 transitions, 10346 flow [2024-06-20 15:51:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:51:46,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:51:46,537 INFO L175 Difference]: Start difference. First operand has 236 places, 566 transitions, 8578 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:51:46,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 611 transitions, 10346 flow [2024-06-20 15:51:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 611 transitions, 10297 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:51:47,280 INFO L231 Difference]: Finished difference. Result has 242 places, 577 transitions, 8893 flow [2024-06-20 15:51:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8529, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8893, PETRI_PLACES=242, PETRI_TRANSITIONS=577} [2024-06-20 15:51:47,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-20 15:51:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 577 transitions, 8893 flow [2024-06-20 15:51:47,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:47,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:47,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:51:47,282 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2100198723, now seen corresponding path program 11 times [2024-06-20 15:51:47,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:47,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201846364] [2024-06-20 15:51:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:47,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:48,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:48,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201846364] [2024-06-20 15:51:48,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201846364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:48,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:48,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031003382] [2024-06-20 15:51:48,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:48,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:48,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 577 transitions, 8893 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:48,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:48,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:48,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:49,754 INFO L124 PetriNetUnfolderBase]: 4106/6332 cut-off events. [2024-06-20 15:51:49,755 INFO L125 PetriNetUnfolderBase]: For 361990/362006 co-relation queries the response was YES. [2024-06-20 15:51:49,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53041 conditions, 6332 events. 4106/6332 cut-off events. For 361990/362006 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36206 event pairs, 1384 based on Foata normal form. 7/6314 useless extension candidates. Maximal degree in co-relation 52932. Up to 5938 conditions per place. [2024-06-20 15:51:49,836 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 552 selfloop transitions, 38 changer transitions 0/599 dead transitions. [2024-06-20 15:51:49,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 599 transitions, 10183 flow [2024-06-20 15:51:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:51:49,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 15:51:49,837 INFO L175 Difference]: Start difference. First operand has 242 places, 577 transitions, 8893 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:51:49,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 599 transitions, 10183 flow [2024-06-20 15:51:50,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 599 transitions, 9907 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-20 15:51:50,637 INFO L231 Difference]: Finished difference. Result has 245 places, 577 transitions, 8712 flow [2024-06-20 15:51:50,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8617, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8712, PETRI_PLACES=245, PETRI_TRANSITIONS=577} [2024-06-20 15:51:50,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-20 15:51:50,639 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 577 transitions, 8712 flow [2024-06-20 15:51:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:50,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:50,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:51:50,640 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:51:50,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2108479629, now seen corresponding path program 9 times [2024-06-20 15:51:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:50,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552500673] [2024-06-20 15:51:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:50,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:51,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:51,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552500673] [2024-06-20 15:51:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552500673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:51,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:51:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478367199] [2024-06-20 15:51:51,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:51:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:51:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:51:51,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:51:51,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 577 transitions, 8712 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:51,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:51,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:51:51,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:52,844 INFO L124 PetriNetUnfolderBase]: 4084/6304 cut-off events. [2024-06-20 15:51:52,844 INFO L125 PetriNetUnfolderBase]: For 369226/369242 co-relation queries the response was YES. [2024-06-20 15:51:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52428 conditions, 6304 events. 4084/6304 cut-off events. For 369226/369242 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36092 event pairs, 1378 based on Foata normal form. 10/6290 useless extension candidates. Maximal degree in co-relation 52318. Up to 5879 conditions per place. [2024-06-20 15:51:52,919 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 564 selfloop transitions, 32 changer transitions 0/605 dead transitions. [2024-06-20 15:51:52,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 605 transitions, 10052 flow [2024-06-20 15:51:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:51:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:51:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 15:51:52,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-20 15:51:52,920 INFO L175 Difference]: Start difference. First operand has 245 places, 577 transitions, 8712 flow. Second operand 8 states and 151 transitions. [2024-06-20 15:51:52,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 605 transitions, 10052 flow [2024-06-20 15:51:53,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 605 transitions, 9727 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:53,714 INFO L231 Difference]: Finished difference. Result has 247 places, 577 transitions, 8468 flow [2024-06-20 15:51:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8387, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8468, PETRI_PLACES=247, PETRI_TRANSITIONS=577} [2024-06-20 15:51:53,715 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-20 15:51:53,715 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 577 transitions, 8468 flow [2024-06-20 15:51:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-20 15:51:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:51:53,716 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)] === [2024-06-20 15:51:53,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1892595837, now seen corresponding path program 3 times [2024-06-20 15:51:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649478271] [2024-06-20 15:51:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:54,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649478271] [2024-06-20 15:51:54,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649478271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:54,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:51:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194548138] [2024-06-20 15:51:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:51:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:51:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:51:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:51:54,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 577 transitions, 8468 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:51:54,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:54,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:51:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:56,029 INFO L124 PetriNetUnfolderBase]: 4697/7095 cut-off events. [2024-06-20 15:51:56,029 INFO L125 PetriNetUnfolderBase]: For 412616/412627 co-relation queries the response was YES. [2024-06-20 15:51:56,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57220 conditions, 7095 events. 4697/7095 cut-off events. For 412616/412627 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39017 event pairs, 1727 based on Foata normal form. 12/7089 useless extension candidates. Maximal degree in co-relation 57109. Up to 6728 conditions per place. [2024-06-20 15:51:56,104 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 511 selfloop transitions, 13 changer transitions 0/585 dead transitions. [2024-06-20 15:51:56,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 585 transitions, 9544 flow [2024-06-20 15:51:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 15:51:56,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-20 15:51:56,106 INFO L175 Difference]: Start difference. First operand has 247 places, 577 transitions, 8468 flow. Second operand 7 states and 112 transitions. [2024-06-20 15:51:56,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 585 transitions, 9544 flow [2024-06-20 15:51:56,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 585 transitions, 9329 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-20 15:51:56,841 INFO L231 Difference]: Finished difference. Result has 245 places, 577 transitions, 8285 flow [2024-06-20 15:51:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8253, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8285, PETRI_PLACES=245, PETRI_TRANSITIONS=577} [2024-06-20 15:51:56,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-20 15:51:56,841 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 577 transitions, 8285 flow [2024-06-20 15:51:56,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 15:51:56,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:56,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:51:56,842 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)] === [2024-06-20 15:51:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1546762257, now seen corresponding path program 1 times [2024-06-20 15:51:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:56,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436551374] [2024-06-20 15:51:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:57,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436551374] [2024-06-20 15:51:57,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436551374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:57,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:57,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:51:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630980110] [2024-06-20 15:51:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:57,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:51:57,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:51:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:51:57,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:51:57,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 577 transitions, 8285 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:57,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:57,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:51:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:59,058 INFO L124 PetriNetUnfolderBase]: 4702/7102 cut-off events. [2024-06-20 15:51:59,058 INFO L125 PetriNetUnfolderBase]: For 423873/423884 co-relation queries the response was YES. [2024-06-20 15:51:59,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57103 conditions, 7102 events. 4702/7102 cut-off events. For 423873/423884 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39008 event pairs, 1727 based on Foata normal form. 12/7096 useless extension candidates. Maximal degree in co-relation 56991. Up to 6722 conditions per place. [2024-06-20 15:51:59,150 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 516 selfloop transitions, 18 changer transitions 0/595 dead transitions. [2024-06-20 15:51:59,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 595 transitions, 9557 flow [2024-06-20 15:51:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 15:51:59,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-20 15:51:59,151 INFO L175 Difference]: Start difference. First operand has 245 places, 577 transitions, 8285 flow. Second operand 7 states and 118 transitions. [2024-06-20 15:51:59,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 595 transitions, 9557 flow [2024-06-20 15:51:59,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 595 transitions, 9516 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:51:59,949 INFO L231 Difference]: Finished difference. Result has 246 places, 583 transitions, 8356 flow [2024-06-20 15:51:59,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8356, PETRI_PLACES=246, PETRI_TRANSITIONS=583} [2024-06-20 15:51:59,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-20 15:51:59,950 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 583 transitions, 8356 flow [2024-06-20 15:51:59,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:59,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:59,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:51:59,951 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)] === [2024-06-20 15:51:59,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:59,951 INFO L85 PathProgramCache]: Analyzing trace with hash -855780157, now seen corresponding path program 2 times [2024-06-20 15:51:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:59,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955862362] [2024-06-20 15:51:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955862362] [2024-06-20 15:52:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955862362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333572265] [2024-06-20 15:52:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:00,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:00,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:52:00,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 583 transitions, 8356 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:00,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:00,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:52:00,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:02,113 INFO L124 PetriNetUnfolderBase]: 4699/7100 cut-off events. [2024-06-20 15:52:02,114 INFO L125 PetriNetUnfolderBase]: For 438057/438071 co-relation queries the response was YES. [2024-06-20 15:52:02,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57741 conditions, 7100 events. 4699/7100 cut-off events. For 438057/438071 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38969 event pairs, 1730 based on Foata normal form. 14/7095 useless extension candidates. Maximal degree in co-relation 57628. Up to 6719 conditions per place. [2024-06-20 15:52:02,199 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 512 selfloop transitions, 18 changer transitions 0/591 dead transitions. [2024-06-20 15:52:02,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 591 transitions, 9444 flow [2024-06-20 15:52:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 15:52:02,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-20 15:52:02,200 INFO L175 Difference]: Start difference. First operand has 246 places, 583 transitions, 8356 flow. Second operand 7 states and 114 transitions. [2024-06-20 15:52:02,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 591 transitions, 9444 flow [2024-06-20 15:52:02,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 591 transitions, 9387 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:02,900 INFO L231 Difference]: Finished difference. Result has 250 places, 583 transitions, 8341 flow [2024-06-20 15:52:02,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8341, PETRI_PLACES=250, PETRI_TRANSITIONS=583} [2024-06-20 15:52:02,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-20 15:52:02,903 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 583 transitions, 8341 flow [2024-06-20 15:52:02,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:02,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:02,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:02,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:52:02,903 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:02,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2108787459, now seen corresponding path program 1 times [2024-06-20 15:52:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:02,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691539903] [2024-06-20 15:52:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:03,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:03,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691539903] [2024-06-20 15:52:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691539903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:03,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:03,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370239766] [2024-06-20 15:52:03,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:03,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:04,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:52:04,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 583 transitions, 8341 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:04,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:04,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:52:04,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:05,648 INFO L124 PetriNetUnfolderBase]: 4712/7114 cut-off events. [2024-06-20 15:52:05,649 INFO L125 PetriNetUnfolderBase]: For 463774/463785 co-relation queries the response was YES. [2024-06-20 15:52:05,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58733 conditions, 7114 events. 4712/7114 cut-off events. For 463774/463785 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 39102 event pairs, 1633 based on Foata normal form. 4/7091 useless extension candidates. Maximal degree in co-relation 58618. Up to 6803 conditions per place. [2024-06-20 15:52:05,739 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 583 selfloop transitions, 22 changer transitions 0/615 dead transitions. [2024-06-20 15:52:05,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 615 transitions, 9730 flow [2024-06-20 15:52:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 15:52:05,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-20 15:52:05,740 INFO L175 Difference]: Start difference. First operand has 250 places, 583 transitions, 8341 flow. Second operand 9 states and 158 transitions. [2024-06-20 15:52:05,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 615 transitions, 9730 flow [2024-06-20 15:52:06,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 615 transitions, 9675 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:06,578 INFO L231 Difference]: Finished difference. Result has 253 places, 588 transitions, 8410 flow [2024-06-20 15:52:06,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8286, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8410, PETRI_PLACES=253, PETRI_TRANSITIONS=588} [2024-06-20 15:52:06,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-20 15:52:06,579 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 588 transitions, 8410 flow [2024-06-20 15:52:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:06,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:06,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:06,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:52:06,579 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:06,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1400130173, now seen corresponding path program 1 times [2024-06-20 15:52:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:06,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865314476] [2024-06-20 15:52:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865314476] [2024-06-20 15:52:07,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865314476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:07,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:07,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313431214] [2024-06-20 15:52:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:07,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:07,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 588 transitions, 8410 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:07,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:07,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:07,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:09,013 INFO L124 PetriNetUnfolderBase]: 4355/6714 cut-off events. [2024-06-20 15:52:09,013 INFO L125 PetriNetUnfolderBase]: For 459216/459237 co-relation queries the response was YES. [2024-06-20 15:52:09,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56683 conditions, 6714 events. 4355/6714 cut-off events. For 459216/459237 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38138 event pairs, 757 based on Foata normal form. 12/6720 useless extension candidates. Maximal degree in co-relation 56567. Up to 4601 conditions per place. [2024-06-20 15:52:09,090 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 347 selfloop transitions, 271 changer transitions 0/630 dead transitions. [2024-06-20 15:52:09,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 630 transitions, 10184 flow [2024-06-20 15:52:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-20 15:52:09,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-20 15:52:09,091 INFO L175 Difference]: Start difference. First operand has 253 places, 588 transitions, 8410 flow. Second operand 9 states and 182 transitions. [2024-06-20 15:52:09,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 630 transitions, 10184 flow [2024-06-20 15:52:09,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 630 transitions, 10107 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:09,869 INFO L231 Difference]: Finished difference. Result has 257 places, 595 transitions, 9101 flow [2024-06-20 15:52:09,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8333, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9101, PETRI_PLACES=257, PETRI_TRANSITIONS=595} [2024-06-20 15:52:09,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-20 15:52:09,870 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 595 transitions, 9101 flow [2024-06-20 15:52:09,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:09,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:09,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:09,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:52:09,871 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:09,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1819673727, now seen corresponding path program 2 times [2024-06-20 15:52:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:09,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467869023] [2024-06-20 15:52:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:09,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:10,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467869023] [2024-06-20 15:52:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467869023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145797901] [2024-06-20 15:52:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:10,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:10,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 595 transitions, 9101 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:10,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:10,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:10,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:12,422 INFO L124 PetriNetUnfolderBase]: 4442/6840 cut-off events. [2024-06-20 15:52:12,427 INFO L125 PetriNetUnfolderBase]: For 498111/498132 co-relation queries the response was YES. [2024-06-20 15:52:12,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59516 conditions, 6840 events. 4442/6840 cut-off events. For 498111/498132 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39078 event pairs, 954 based on Foata normal form. 14/6830 useless extension candidates. Maximal degree in co-relation 59398. Up to 4995 conditions per place. [2024-06-20 15:52:12,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 279 changer transitions 0/641 dead transitions. [2024-06-20 15:52:12,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 641 transitions, 10921 flow [2024-06-20 15:52:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:52:12,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:52:12,502 INFO L175 Difference]: Start difference. First operand has 257 places, 595 transitions, 9101 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:52:12,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 641 transitions, 10921 flow [2024-06-20 15:52:13,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 641 transitions, 10497 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:13,398 INFO L231 Difference]: Finished difference. Result has 263 places, 606 transitions, 9566 flow [2024-06-20 15:52:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9566, PETRI_PLACES=263, PETRI_TRANSITIONS=606} [2024-06-20 15:52:13,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-20 15:52:13,399 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 606 transitions, 9566 flow [2024-06-20 15:52:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:13,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:13,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:52:13,400 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)] === [2024-06-20 15:52:13,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2100734209, now seen corresponding path program 3 times [2024-06-20 15:52:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166592782] [2024-06-20 15:52:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:13,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:14,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166592782] [2024-06-20 15:52:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166592782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:14,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710017168] [2024-06-20 15:52:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:14,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:14,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 606 transitions, 9566 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:14,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:14,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:14,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:15,946 INFO L124 PetriNetUnfolderBase]: 4504/6944 cut-off events. [2024-06-20 15:52:15,946 INFO L125 PetriNetUnfolderBase]: For 517861/517882 co-relation queries the response was YES. [2024-06-20 15:52:16,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61379 conditions, 6944 events. 4504/6944 cut-off events. For 517861/517882 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 39691 event pairs, 972 based on Foata normal form. 14/6952 useless extension candidates. Maximal degree in co-relation 61258. Up to 5581 conditions per place. [2024-06-20 15:52:16,033 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 376 selfloop transitions, 261 changer transitions 0/649 dead transitions. [2024-06-20 15:52:16,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 649 transitions, 11306 flow [2024-06-20 15:52:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:52:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-20 15:52:16,034 INFO L175 Difference]: Start difference. First operand has 263 places, 606 transitions, 9566 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:52:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 649 transitions, 11306 flow [2024-06-20 15:52:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 649 transitions, 11061 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:17,140 INFO L231 Difference]: Finished difference. Result has 268 places, 614 transitions, 9991 flow [2024-06-20 15:52:17,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9321, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9991, PETRI_PLACES=268, PETRI_TRANSITIONS=614} [2024-06-20 15:52:17,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-20 15:52:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 614 transitions, 9991 flow [2024-06-20 15:52:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:17,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:17,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:17,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:52:17,141 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1821551397, now seen corresponding path program 4 times [2024-06-20 15:52:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777248872] [2024-06-20 15:52:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777248872] [2024-06-20 15:52:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777248872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:18,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:18,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:18,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556878205] [2024-06-20 15:52:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:18,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:18,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:18,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 614 transitions, 9991 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:18,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:18,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:18,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:19,824 INFO L124 PetriNetUnfolderBase]: 4491/6923 cut-off events. [2024-06-20 15:52:19,824 INFO L125 PetriNetUnfolderBase]: For 530829/530850 co-relation queries the response was YES. [2024-06-20 15:52:19,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62178 conditions, 6923 events. 4491/6923 cut-off events. For 530829/530850 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39527 event pairs, 982 based on Foata normal form. 14/6931 useless extension candidates. Maximal degree in co-relation 62055. Up to 5748 conditions per place. [2024-06-20 15:52:19,913 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 381 selfloop transitions, 252 changer transitions 0/645 dead transitions. [2024-06-20 15:52:19,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 645 transitions, 11393 flow [2024-06-20 15:52:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:52:19,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 15:52:19,915 INFO L175 Difference]: Start difference. First operand has 268 places, 614 transitions, 9991 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:52:19,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 645 transitions, 11393 flow [2024-06-20 15:52:20,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 645 transitions, 11202 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:20,930 INFO L231 Difference]: Finished difference. Result has 273 places, 614 transitions, 10320 flow [2024-06-20 15:52:20,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9800, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10320, PETRI_PLACES=273, PETRI_TRANSITIONS=614} [2024-06-20 15:52:20,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-20 15:52:20,931 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 614 transitions, 10320 flow [2024-06-20 15:52:20,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:20,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:20,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:20,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:52:20,932 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:20,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1821551552, now seen corresponding path program 2 times [2024-06-20 15:52:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:20,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419730184] [2024-06-20 15:52:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419730184] [2024-06-20 15:52:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419730184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:21,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761755069] [2024-06-20 15:52:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:21,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:21,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:21,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 614 transitions, 10320 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:21,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:21,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:21,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:23,432 INFO L124 PetriNetUnfolderBase]: 4647/7164 cut-off events. [2024-06-20 15:52:23,432 INFO L125 PetriNetUnfolderBase]: For 558368/558387 co-relation queries the response was YES. [2024-06-20 15:52:23,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64790 conditions, 7164 events. 4647/7164 cut-off events. For 558368/558387 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41334 event pairs, 1010 based on Foata normal form. 12/7169 useless extension candidates. Maximal degree in co-relation 64665. Up to 4921 conditions per place. [2024-06-20 15:52:23,530 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 319 changer transitions 0/696 dead transitions. [2024-06-20 15:52:23,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 696 transitions, 12700 flow [2024-06-20 15:52:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-20 15:52:23,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064599483204134 [2024-06-20 15:52:23,531 INFO L175 Difference]: Start difference. First operand has 273 places, 614 transitions, 10320 flow. Second operand 9 states and 196 transitions. [2024-06-20 15:52:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 696 transitions, 12700 flow [2024-06-20 15:52:24,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 696 transitions, 12167 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:24,530 INFO L231 Difference]: Finished difference. Result has 275 places, 644 transitions, 10836 flow [2024-06-20 15:52:24,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9787, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10836, PETRI_PLACES=275, PETRI_TRANSITIONS=644} [2024-06-20 15:52:24,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-20 15:52:24,531 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 644 transitions, 10836 flow [2024-06-20 15:52:24,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-20 15:52:24,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:24,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:52:24,532 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)] === [2024-06-20 15:52:24,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 486922781, now seen corresponding path program 1 times [2024-06-20 15:52:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:24,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912231889] [2024-06-20 15:52:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912231889] [2024-06-20 15:52:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912231889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:25,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:25,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:25,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619402184] [2024-06-20 15:52:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:25,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:25,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:25,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:25,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:52:25,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 644 transitions, 10836 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:52:25,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:25,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:52:25,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:26,761 INFO L124 PetriNetUnfolderBase]: 5044/7623 cut-off events. [2024-06-20 15:52:26,761 INFO L125 PetriNetUnfolderBase]: For 591761/591778 co-relation queries the response was YES. [2024-06-20 15:52:26,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68961 conditions, 7623 events. 5044/7623 cut-off events. For 591761/591778 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42524 event pairs, 1418 based on Foata normal form. 17/7628 useless extension candidates. Maximal degree in co-relation 68834. Up to 6883 conditions per place. [2024-06-20 15:52:26,857 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 543 selfloop transitions, 71 changer transitions 0/687 dead transitions. [2024-06-20 15:52:26,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 687 transitions, 12696 flow [2024-06-20 15:52:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 15:52:26,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-20 15:52:26,859 INFO L175 Difference]: Start difference. First operand has 275 places, 644 transitions, 10836 flow. Second operand 8 states and 155 transitions. [2024-06-20 15:52:26,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 687 transitions, 12696 flow [2024-06-20 15:52:27,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 687 transitions, 12539 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:27,889 INFO L231 Difference]: Finished difference. Result has 281 places, 662 transitions, 11245 flow [2024-06-20 15:52:27,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11245, PETRI_PLACES=281, PETRI_TRANSITIONS=662} [2024-06-20 15:52:27,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-20 15:52:27,891 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 662 transitions, 11245 flow [2024-06-20 15:52:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:52:27,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:27,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:27,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:52:27,892 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:27,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1122899991, now seen corresponding path program 5 times [2024-06-20 15:52:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808401040] [2024-06-20 15:52:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:28,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808401040] [2024-06-20 15:52:28,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808401040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:28,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:28,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225688664] [2024-06-20 15:52:28,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:28,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:29,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 662 transitions, 11245 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:31,023 INFO L124 PetriNetUnfolderBase]: 4811/7413 cut-off events. [2024-06-20 15:52:31,023 INFO L125 PetriNetUnfolderBase]: For 598986/599003 co-relation queries the response was YES. [2024-06-20 15:52:31,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68946 conditions, 7413 events. 4811/7413 cut-off events. For 598986/599003 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43092 event pairs, 1174 based on Foata normal form. 12/7409 useless extension candidates. Maximal degree in co-relation 68815. Up to 6369 conditions per place. [2024-06-20 15:52:31,122 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 542 selfloop transitions, 161 changer transitions 0/718 dead transitions. [2024-06-20 15:52:31,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 718 transitions, 13286 flow [2024-06-20 15:52:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 15:52:31,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 15:52:31,123 INFO L175 Difference]: Start difference. First operand has 281 places, 662 transitions, 11245 flow. Second operand 10 states and 205 transitions. [2024-06-20 15:52:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 718 transitions, 13286 flow [2024-06-20 15:52:32,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 718 transitions, 13207 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:32,380 INFO L231 Difference]: Finished difference. Result has 290 places, 677 transitions, 11800 flow [2024-06-20 15:52:32,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11800, PETRI_PLACES=290, PETRI_TRANSITIONS=677} [2024-06-20 15:52:32,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-20 15:52:32,385 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 677 transitions, 11800 flow [2024-06-20 15:52:32,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:32,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:32,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:52:32,386 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:32,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash 777376741, now seen corresponding path program 6 times [2024-06-20 15:52:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106730329] [2024-06-20 15:52:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:32,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106730329] [2024-06-20 15:52:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106730329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452047906] [2024-06-20 15:52:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:33,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:33,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 677 transitions, 11800 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:33,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:33,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:33,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:35,643 INFO L124 PetriNetUnfolderBase]: 4839/7463 cut-off events. [2024-06-20 15:52:35,643 INFO L125 PetriNetUnfolderBase]: For 623506/623523 co-relation queries the response was YES. [2024-06-20 15:52:35,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70423 conditions, 7463 events. 4839/7463 cut-off events. For 623506/623523 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43539 event pairs, 1191 based on Foata normal form. 12/7459 useless extension candidates. Maximal degree in co-relation 70289. Up to 6578 conditions per place. [2024-06-20 15:52:35,748 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 555 selfloop transitions, 151 changer transitions 0/721 dead transitions. [2024-06-20 15:52:35,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 721 transitions, 13482 flow [2024-06-20 15:52:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 15:52:35,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-20 15:52:35,749 INFO L175 Difference]: Start difference. First operand has 290 places, 677 transitions, 11800 flow. Second operand 11 states and 217 transitions. [2024-06-20 15:52:35,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 721 transitions, 13482 flow [2024-06-20 15:52:37,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 721 transitions, 13251 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:37,063 INFO L231 Difference]: Finished difference. Result has 295 places, 681 transitions, 11973 flow [2024-06-20 15:52:37,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11973, PETRI_PLACES=295, PETRI_TRANSITIONS=681} [2024-06-20 15:52:37,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-20 15:52:37,064 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 681 transitions, 11973 flow [2024-06-20 15:52:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:37,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:52:37,065 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:37,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash 777376896, now seen corresponding path program 3 times [2024-06-20 15:52:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:37,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384113995] [2024-06-20 15:52:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:38,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:38,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384113995] [2024-06-20 15:52:38,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384113995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:38,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:38,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431183256] [2024-06-20 15:52:38,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:38,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:38,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:38,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:38,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 681 transitions, 11973 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:38,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:38,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:38,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:40,385 INFO L124 PetriNetUnfolderBase]: 4894/7541 cut-off events. [2024-06-20 15:52:40,385 INFO L125 PetriNetUnfolderBase]: For 645823/645840 co-relation queries the response was YES. [2024-06-20 15:52:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71809 conditions, 7541 events. 4894/7541 cut-off events. For 645823/645840 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44037 event pairs, 1171 based on Foata normal form. 10/7533 useless extension candidates. Maximal degree in co-relation 71673. Up to 6118 conditions per place. [2024-06-20 15:52:40,490 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 505 selfloop transitions, 222 changer transitions 0/742 dead transitions. [2024-06-20 15:52:40,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 742 transitions, 14022 flow [2024-06-20 15:52:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:52:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:52:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-20 15:52:40,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 15:52:40,491 INFO L175 Difference]: Start difference. First operand has 295 places, 681 transitions, 11973 flow. Second operand 12 states and 246 transitions. [2024-06-20 15:52:40,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 742 transitions, 14022 flow [2024-06-20 15:52:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 742 transitions, 13721 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:41,870 INFO L231 Difference]: Finished difference. Result has 299 places, 687 transitions, 12222 flow [2024-06-20 15:52:41,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11672, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12222, PETRI_PLACES=299, PETRI_TRANSITIONS=687} [2024-06-20 15:52:41,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-20 15:52:41,871 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 687 transitions, 12222 flow [2024-06-20 15:52:41,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:41,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:41,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:52:41,871 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)] === [2024-06-20 15:52:41,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 782883426, now seen corresponding path program 4 times [2024-06-20 15:52:41,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:41,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105570419] [2024-06-20 15:52:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:42,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105570419] [2024-06-20 15:52:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105570419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:42,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:42,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789048089] [2024-06-20 15:52:42,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:42,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:42,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 687 transitions, 12222 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:45,219 INFO L124 PetriNetUnfolderBase]: 4947/7616 cut-off events. [2024-06-20 15:52:45,219 INFO L125 PetriNetUnfolderBase]: For 675083/675106 co-relation queries the response was YES. [2024-06-20 15:52:45,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73313 conditions, 7616 events. 4947/7616 cut-off events. For 675083/675106 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44532 event pairs, 1173 based on Foata normal form. 14/7614 useless extension candidates. Maximal degree in co-relation 73176. Up to 6335 conditions per place. [2024-06-20 15:52:45,330 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 538 selfloop transitions, 189 changer transitions 0/742 dead transitions. [2024-06-20 15:52:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 742 transitions, 14254 flow [2024-06-20 15:52:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-20 15:52:45,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780126849894294 [2024-06-20 15:52:45,332 INFO L175 Difference]: Start difference. First operand has 299 places, 687 transitions, 12222 flow. Second operand 11 states and 226 transitions. [2024-06-20 15:52:45,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 742 transitions, 14254 flow [2024-06-20 15:52:46,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 742 transitions, 13990 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:46,637 INFO L231 Difference]: Finished difference. Result has 302 places, 693 transitions, 12452 flow [2024-06-20 15:52:46,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11958, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12452, PETRI_PLACES=302, PETRI_TRANSITIONS=693} [2024-06-20 15:52:46,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-20 15:52:46,638 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 693 transitions, 12452 flow [2024-06-20 15:52:46,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:46,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:46,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:46,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:52:46,639 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)] === [2024-06-20 15:52:46,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash 782883271, now seen corresponding path program 7 times [2024-06-20 15:52:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:46,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78007678] [2024-06-20 15:52:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:46,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:47,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78007678] [2024-06-20 15:52:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78007678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:47,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:47,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788644204] [2024-06-20 15:52:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:47,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:47,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:48,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 693 transitions, 12452 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:48,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:48,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:50,102 INFO L124 PetriNetUnfolderBase]: 4942/7611 cut-off events. [2024-06-20 15:52:50,102 INFO L125 PetriNetUnfolderBase]: For 691228/691251 co-relation queries the response was YES. [2024-06-20 15:52:50,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74027 conditions, 7611 events. 4942/7611 cut-off events. For 691228/691251 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44509 event pairs, 1212 based on Foata normal form. 16/7611 useless extension candidates. Maximal degree in co-relation 73888. Up to 6811 conditions per place. [2024-06-20 15:52:50,209 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 595 selfloop transitions, 118 changer transitions 0/728 dead transitions. [2024-06-20 15:52:50,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 728 transitions, 14069 flow [2024-06-20 15:52:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 15:52:50,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:52:50,210 INFO L175 Difference]: Start difference. First operand has 302 places, 693 transitions, 12452 flow. Second operand 10 states and 195 transitions. [2024-06-20 15:52:50,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 728 transitions, 14069 flow [2024-06-20 15:52:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 728 transitions, 13831 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:51,764 INFO L231 Difference]: Finished difference. Result has 305 places, 695 transitions, 12506 flow [2024-06-20 15:52:51,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12214, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12506, PETRI_PLACES=305, PETRI_TRANSITIONS=695} [2024-06-20 15:52:51,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-20 15:52:51,764 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 695 transitions, 12506 flow [2024-06-20 15:52:51,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:51,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:52:51,765 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)] === [2024-06-20 15:52:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 783090816, now seen corresponding path program 5 times [2024-06-20 15:52:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946599752] [2024-06-20 15:52:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:52,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:52,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946599752] [2024-06-20 15:52:52,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946599752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:52,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:52,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:52,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29010827] [2024-06-20 15:52:52,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:52,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:52,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:53,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:52:53,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 695 transitions, 12506 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:53,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:53,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:52:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:55,043 INFO L124 PetriNetUnfolderBase]: 4940/7602 cut-off events. [2024-06-20 15:52:55,043 INFO L125 PetriNetUnfolderBase]: For 702633/702656 co-relation queries the response was YES. [2024-06-20 15:52:55,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74459 conditions, 7602 events. 4940/7602 cut-off events. For 702633/702656 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44361 event pairs, 1173 based on Foata normal form. 14/7600 useless extension candidates. Maximal degree in co-relation 74318. Up to 6374 conditions per place. [2024-06-20 15:52:55,152 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 538 selfloop transitions, 182 changer transitions 0/735 dead transitions. [2024-06-20 15:52:55,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 735 transitions, 14158 flow [2024-06-20 15:52:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 15:52:55,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-20 15:52:55,154 INFO L175 Difference]: Start difference. First operand has 305 places, 695 transitions, 12506 flow. Second operand 10 states and 203 transitions. [2024-06-20 15:52:55,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 735 transitions, 14158 flow [2024-06-20 15:52:56,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 735 transitions, 13868 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:56,890 INFO L231 Difference]: Finished difference. Result has 307 places, 695 transitions, 12588 flow [2024-06-20 15:52:56,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12216, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12588, PETRI_PLACES=307, PETRI_TRANSITIONS=695} [2024-06-20 15:52:56,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-20 15:52:56,891 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 695 transitions, 12588 flow [2024-06-20 15:52:56,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:56,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:56,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:56,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:52:56,892 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:52:56,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2012977643, now seen corresponding path program 2 times [2024-06-20 15:52:56,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:56,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417659004] [2024-06-20 15:52:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:56,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417659004] [2024-06-20 15:52:57,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417659004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:57,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:57,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708695325] [2024-06-20 15:52:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:57,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:52:57,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 695 transitions, 12588 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:57,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:57,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:52:57,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:59,715 INFO L124 PetriNetUnfolderBase]: 5320/8051 cut-off events. [2024-06-20 15:52:59,716 INFO L125 PetriNetUnfolderBase]: For 729604/729617 co-relation queries the response was YES. [2024-06-20 15:52:59,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77797 conditions, 8051 events. 5320/8051 cut-off events. For 729604/729617 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45503 event pairs, 1484 based on Foata normal form. 13/8052 useless extension candidates. Maximal degree in co-relation 77655. Up to 7265 conditions per place. [2024-06-20 15:52:59,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 577 selfloop transitions, 79 changer transitions 0/735 dead transitions. [2024-06-20 15:52:59,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 735 transitions, 14544 flow [2024-06-20 15:52:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:52:59,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:52:59,835 INFO L175 Difference]: Start difference. First operand has 307 places, 695 transitions, 12588 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:52:59,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 735 transitions, 14544 flow [2024-06-20 15:53:01,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 735 transitions, 14169 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:01,523 INFO L231 Difference]: Finished difference. Result has 307 places, 711 transitions, 12613 flow [2024-06-20 15:53:01,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12213, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12613, PETRI_PLACES=307, PETRI_TRANSITIONS=711} [2024-06-20 15:53:01,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-20 15:53:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 711 transitions, 12613 flow [2024-06-20 15:53:01,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:53:01,527 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:01,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1390785323, now seen corresponding path program 3 times [2024-06-20 15:53:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479264346] [2024-06-20 15:53:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:02,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479264346] [2024-06-20 15:53:02,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479264346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:02,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:02,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:53:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017082320] [2024-06-20 15:53:02,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:53:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:53:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:53:02,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:53:02,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 711 transitions, 12613 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:53:02,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:02,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:53:02,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:04,167 INFO L124 PetriNetUnfolderBase]: 5313/8046 cut-off events. [2024-06-20 15:53:04,167 INFO L125 PetriNetUnfolderBase]: For 744936/744955 co-relation queries the response was YES. [2024-06-20 15:53:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77381 conditions, 8046 events. 5313/8046 cut-off events. For 744936/744955 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 45484 event pairs, 1480 based on Foata normal form. 17/8051 useless extension candidates. Maximal degree in co-relation 77237. Up to 7260 conditions per place. [2024-06-20 15:53:04,290 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 573 selfloop transitions, 79 changer transitions 0/731 dead transitions. [2024-06-20 15:53:04,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 731 transitions, 14241 flow [2024-06-20 15:53:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:53:04,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-20 15:53:04,292 INFO L175 Difference]: Start difference. First operand has 307 places, 711 transitions, 12613 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:53:04,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 731 transitions, 14241 flow [2024-06-20 15:53:06,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 731 transitions, 14123 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:53:06,334 INFO L231 Difference]: Finished difference. Result has 312 places, 711 transitions, 12661 flow [2024-06-20 15:53:06,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12495, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12661, PETRI_PLACES=312, PETRI_TRANSITIONS=711} [2024-06-20 15:53:06,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-20 15:53:06,335 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 711 transitions, 12661 flow [2024-06-20 15:53:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:53:06,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:06,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:53:06,335 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1794804017, now seen corresponding path program 8 times [2024-06-20 15:53:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:06,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634378870] [2024-06-20 15:53:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:06,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:07,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634378870] [2024-06-20 15:53:07,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634378870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:07,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048636306] [2024-06-20 15:53:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:07,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:07,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:07,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:07,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 711 transitions, 12661 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:07,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:07,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:07,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:09,394 INFO L124 PetriNetUnfolderBase]: 5179/7957 cut-off events. [2024-06-20 15:53:09,395 INFO L125 PetriNetUnfolderBase]: For 784792/784808 co-relation queries the response was YES. [2024-06-20 15:53:09,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78366 conditions, 7957 events. 5179/7957 cut-off events. For 784792/784808 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46822 event pairs, 1490 based on Foata normal form. 6/7919 useless extension candidates. Maximal degree in co-relation 78221. Up to 6435 conditions per place. [2024-06-20 15:53:09,507 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 538 selfloop transitions, 245 changer transitions 0/802 dead transitions. [2024-06-20 15:53:09,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 802 transitions, 15649 flow [2024-06-20 15:53:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:53:09,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:53:09,509 INFO L175 Difference]: Start difference. First operand has 312 places, 711 transitions, 12661 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:53:09,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 802 transitions, 15649 flow [2024-06-20 15:53:11,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 802 transitions, 15496 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:11,753 INFO L231 Difference]: Finished difference. Result has 320 places, 759 transitions, 14217 flow [2024-06-20 15:53:11,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12508, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14217, PETRI_PLACES=320, PETRI_TRANSITIONS=759} [2024-06-20 15:53:11,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-20 15:53:11,754 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 759 transitions, 14217 flow [2024-06-20 15:53:11,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:11,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:11,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:11,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:53:11,755 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)] === [2024-06-20 15:53:11,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:11,755 INFO L85 PathProgramCache]: Analyzing trace with hash -164670883, now seen corresponding path program 1 times [2024-06-20 15:53:11,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:11,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358198812] [2024-06-20 15:53:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:12,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358198812] [2024-06-20 15:53:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358198812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:12,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:12,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807288219] [2024-06-20 15:53:12,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:12,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:12,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:12,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:53:12,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 759 transitions, 14217 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:12,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:53:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:14,929 INFO L124 PetriNetUnfolderBase]: 5645/8536 cut-off events. [2024-06-20 15:53:14,930 INFO L125 PetriNetUnfolderBase]: For 837113/837132 co-relation queries the response was YES. [2024-06-20 15:53:15,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83998 conditions, 8536 events. 5645/8536 cut-off events. For 837113/837132 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48866 event pairs, 1528 based on Foata normal form. 21/8545 useless extension candidates. Maximal degree in co-relation 83849. Up to 7475 conditions per place. [2024-06-20 15:53:15,057 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 629 selfloop transitions, 89 changer transitions 0/816 dead transitions. [2024-06-20 15:53:15,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 816 transitions, 16636 flow [2024-06-20 15:53:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:53:15,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:53:15,058 INFO L175 Difference]: Start difference. First operand has 320 places, 759 transitions, 14217 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:53:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 816 transitions, 16636 flow [2024-06-20 15:53:17,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 816 transitions, 16407 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:53:17,667 INFO L231 Difference]: Finished difference. Result has 329 places, 779 transitions, 14520 flow [2024-06-20 15:53:17,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13988, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14520, PETRI_PLACES=329, PETRI_TRANSITIONS=779} [2024-06-20 15:53:17,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-20 15:53:17,668 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 779 transitions, 14520 flow [2024-06-20 15:53:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:17,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:53:17,669 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:17,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1173175032, now seen corresponding path program 6 times [2024-06-20 15:53:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308675160] [2024-06-20 15:53:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308675160] [2024-06-20 15:53:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308675160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:18,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:18,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688906213] [2024-06-20 15:53:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:18,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:18,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:18,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 779 transitions, 14520 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:18,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:18,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:18,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:21,208 INFO L124 PetriNetUnfolderBase]: 5405/8279 cut-off events. [2024-06-20 15:53:21,208 INFO L125 PetriNetUnfolderBase]: For 876318/876349 co-relation queries the response was YES. [2024-06-20 15:53:21,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85016 conditions, 8279 events. 5405/8279 cut-off events. For 876318/876349 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48869 event pairs, 1192 based on Foata normal form. 18/8275 useless extension candidates. Maximal degree in co-relation 84861. Up to 5822 conditions per place. [2024-06-20 15:53:21,320 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 413 selfloop transitions, 405 changer transitions 0/837 dead transitions. [2024-06-20 15:53:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 837 transitions, 17154 flow [2024-06-20 15:53:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 15:53:21,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 15:53:21,322 INFO L175 Difference]: Start difference. First operand has 329 places, 779 transitions, 14520 flow. Second operand 9 states and 189 transitions. [2024-06-20 15:53:21,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 837 transitions, 17154 flow [2024-06-20 15:53:23,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 837 transitions, 17034 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-20 15:53:23,354 INFO L231 Difference]: Finished difference. Result has 337 places, 793 transitions, 15679 flow [2024-06-20 15:53:23,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14400, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15679, PETRI_PLACES=337, PETRI_TRANSITIONS=793} [2024-06-20 15:53:23,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-20 15:53:23,354 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 793 transitions, 15679 flow [2024-06-20 15:53:23,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:23,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:23,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:23,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:53:23,355 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:23,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1173175187, now seen corresponding path program 9 times [2024-06-20 15:53:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:23,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140761564] [2024-06-20 15:53:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140761564] [2024-06-20 15:53:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140761564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:24,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040872183] [2024-06-20 15:53:24,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:24,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:24,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:24,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:24,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 793 transitions, 15679 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:24,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:24,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:24,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:26,791 INFO L124 PetriNetUnfolderBase]: 5437/8331 cut-off events. [2024-06-20 15:53:26,792 INFO L125 PetriNetUnfolderBase]: For 906477/906504 co-relation queries the response was YES. [2024-06-20 15:53:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87859 conditions, 8331 events. 5437/8331 cut-off events. For 906477/906504 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49198 event pairs, 1165 based on Foata normal form. 20/8330 useless extension candidates. Maximal degree in co-relation 87700. Up to 6975 conditions per place. [2024-06-20 15:53:26,911 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 500 selfloop transitions, 325 changer transitions 0/844 dead transitions. [2024-06-20 15:53:26,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 844 transitions, 17749 flow [2024-06-20 15:53:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 15:53:26,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-20 15:53:26,913 INFO L175 Difference]: Start difference. First operand has 337 places, 793 transitions, 15679 flow. Second operand 11 states and 214 transitions. [2024-06-20 15:53:26,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 844 transitions, 17749 flow [2024-06-20 15:53:29,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 844 transitions, 17261 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:29,206 INFO L231 Difference]: Finished difference. Result has 343 places, 799 transitions, 16003 flow [2024-06-20 15:53:29,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15191, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16003, PETRI_PLACES=343, PETRI_TRANSITIONS=799} [2024-06-20 15:53:29,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-20 15:53:29,207 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 799 transitions, 16003 flow [2024-06-20 15:53:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:29,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:29,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:29,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:53:29,208 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:29,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1173178907, now seen corresponding path program 10 times [2024-06-20 15:53:29,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:29,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415397006] [2024-06-20 15:53:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415397006] [2024-06-20 15:53:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415397006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:30,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:30,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694580507] [2024-06-20 15:53:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:30,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:30,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 799 transitions, 16003 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:30,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:30,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:30,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:32,536 INFO L124 PetriNetUnfolderBase]: 5690/8741 cut-off events. [2024-06-20 15:53:32,536 INFO L125 PetriNetUnfolderBase]: For 940094/940121 co-relation queries the response was YES. [2024-06-20 15:53:32,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90883 conditions, 8741 events. 5690/8741 cut-off events. For 940094/940121 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52346 event pairs, 1186 based on Foata normal form. 20/8742 useless extension candidates. Maximal degree in co-relation 90723. Up to 7156 conditions per place. [2024-06-20 15:53:32,675 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 527 selfloop transitions, 328 changer transitions 0/874 dead transitions. [2024-06-20 15:53:32,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 874 transitions, 18583 flow [2024-06-20 15:53:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 15:53:32,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:53:32,677 INFO L175 Difference]: Start difference. First operand has 343 places, 799 transitions, 16003 flow. Second operand 9 states and 180 transitions. [2024-06-20 15:53:32,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 874 transitions, 18583 flow [2024-06-20 15:53:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 874 transitions, 17809 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:35,222 INFO L231 Difference]: Finished difference. Result has 343 places, 837 transitions, 16701 flow [2024-06-20 15:53:35,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15305, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16701, PETRI_PLACES=343, PETRI_TRANSITIONS=837} [2024-06-20 15:53:35,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-20 15:53:35,223 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 837 transitions, 16701 flow [2024-06-20 15:53:35,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:35,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:35,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:53:35,224 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1142480494, now seen corresponding path program 7 times [2024-06-20 15:53:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704377461] [2024-06-20 15:53:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:36,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704377461] [2024-06-20 15:53:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704377461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458784408] [2024-06-20 15:53:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:36,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:36,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 837 transitions, 16701 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:36,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:36,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:36,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:38,600 INFO L124 PetriNetUnfolderBase]: 5737/8827 cut-off events. [2024-06-20 15:53:38,601 INFO L125 PetriNetUnfolderBase]: For 937130/937153 co-relation queries the response was YES. [2024-06-20 15:53:38,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91210 conditions, 8827 events. 5737/8827 cut-off events. For 937130/937153 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 53211 event pairs, 1359 based on Foata normal form. 18/8829 useless extension candidates. Maximal degree in co-relation 91049. Up to 7273 conditions per place. [2024-06-20 15:53:38,767 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 619 selfloop transitions, 252 changer transitions 0/890 dead transitions. [2024-06-20 15:53:38,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 890 transitions, 19180 flow [2024-06-20 15:53:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:53:38,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:53:38,769 INFO L175 Difference]: Start difference. First operand has 343 places, 837 transitions, 16701 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:53:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 890 transitions, 19180 flow [2024-06-20 15:53:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 890 transitions, 18519 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:41,757 INFO L231 Difference]: Finished difference. Result has 346 places, 849 transitions, 16771 flow [2024-06-20 15:53:41,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16040, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16771, PETRI_PLACES=346, PETRI_TRANSITIONS=849} [2024-06-20 15:53:41,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-20 15:53:41,758 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 849 transitions, 16771 flow [2024-06-20 15:53:41,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:41,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:41,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:53:41,759 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:41,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1142474914, now seen corresponding path program 8 times [2024-06-20 15:53:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:41,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010601044] [2024-06-20 15:53:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:42,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:42,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010601044] [2024-06-20 15:53:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010601044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:42,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:42,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:42,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025185672] [2024-06-20 15:53:42,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:42,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:42,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 849 transitions, 16771 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:42,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:42,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:42,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:45,296 INFO L124 PetriNetUnfolderBase]: 5809/8943 cut-off events. [2024-06-20 15:53:45,296 INFO L125 PetriNetUnfolderBase]: For 963206/963229 co-relation queries the response was YES. [2024-06-20 15:53:45,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92337 conditions, 8943 events. 5809/8943 cut-off events. For 963206/963229 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 54095 event pairs, 1359 based on Foata normal form. 18/8945 useless extension candidates. Maximal degree in co-relation 92175. Up to 7280 conditions per place. [2024-06-20 15:53:45,426 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 610 selfloop transitions, 277 changer transitions 0/906 dead transitions. [2024-06-20 15:53:45,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 906 transitions, 19355 flow [2024-06-20 15:53:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:53:45,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:53:45,428 INFO L175 Difference]: Start difference. First operand has 346 places, 849 transitions, 16771 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:53:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 906 transitions, 19355 flow [2024-06-20 15:53:48,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 906 transitions, 18759 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:48,523 INFO L231 Difference]: Finished difference. Result has 348 places, 861 transitions, 16981 flow [2024-06-20 15:53:48,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16175, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16981, PETRI_PLACES=348, PETRI_TRANSITIONS=861} [2024-06-20 15:53:48,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-20 15:53:48,536 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 861 transitions, 16981 flow [2024-06-20 15:53:48,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:48,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:48,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:53:48,537 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:48,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1142326889, now seen corresponding path program 11 times [2024-06-20 15:53:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998287221] [2024-06-20 15:53:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:49,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:49,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998287221] [2024-06-20 15:53:49,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998287221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:49,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:49,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:49,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725998636] [2024-06-20 15:53:49,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:49,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:49,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:49,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 861 transitions, 16981 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:52,356 INFO L124 PetriNetUnfolderBase]: 5848/9004 cut-off events. [2024-06-20 15:53:52,356 INFO L125 PetriNetUnfolderBase]: For 988043/988066 co-relation queries the response was YES. [2024-06-20 15:53:52,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93293 conditions, 9004 events. 5848/9004 cut-off events. For 988043/988066 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 54476 event pairs, 1346 based on Foata normal form. 18/9002 useless extension candidates. Maximal degree in co-relation 93130. Up to 7768 conditions per place. [2024-06-20 15:53:52,494 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 683 selfloop transitions, 201 changer transitions 0/903 dead transitions. [2024-06-20 15:53:52,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 903 transitions, 19133 flow [2024-06-20 15:53:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:53:52,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 15:53:52,505 INFO L175 Difference]: Start difference. First operand has 348 places, 861 transitions, 16981 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:53:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 903 transitions, 19133 flow [2024-06-20 15:53:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 903 transitions, 18481 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:55,379 INFO L231 Difference]: Finished difference. Result has 350 places, 867 transitions, 16905 flow [2024-06-20 15:53:55,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16329, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16905, PETRI_PLACES=350, PETRI_TRANSITIONS=867} [2024-06-20 15:53:55,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-20 15:53:55,381 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 867 transitions, 16905 flow [2024-06-20 15:53:55,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:55,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:55,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:55,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:53:55,382 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:53:55,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:55,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1086483222, now seen corresponding path program 9 times [2024-06-20 15:53:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:55,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383819854] [2024-06-20 15:53:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:55,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383819854] [2024-06-20 15:53:56,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383819854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:56,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:56,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721072296] [2024-06-20 15:53:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:56,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:53:56,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 867 transitions, 16905 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:56,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:56,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:53:56,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:58,780 INFO L124 PetriNetUnfolderBase]: 5898/9093 cut-off events. [2024-06-20 15:53:58,781 INFO L125 PetriNetUnfolderBase]: For 1014105/1014128 co-relation queries the response was YES. [2024-06-20 15:53:58,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93728 conditions, 9093 events. 5898/9093 cut-off events. For 1014105/1014128 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 55321 event pairs, 1377 based on Foata normal form. 18/9095 useless extension candidates. Maximal degree in co-relation 93564. Up to 7281 conditions per place. [2024-06-20 15:53:58,932 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 590 selfloop transitions, 315 changer transitions 0/924 dead transitions. [2024-06-20 15:53:58,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 924 transitions, 19565 flow [2024-06-20 15:53:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 15:53:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-20 15:53:58,933 INFO L175 Difference]: Start difference. First operand has 350 places, 867 transitions, 16905 flow. Second operand 9 states and 187 transitions. [2024-06-20 15:53:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 924 transitions, 19565 flow [2024-06-20 15:54:02,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 924 transitions, 19033 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:02,173 INFO L231 Difference]: Finished difference. Result has 352 places, 876 transitions, 17237 flow [2024-06-20 15:54:02,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16373, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17237, PETRI_PLACES=352, PETRI_TRANSITIONS=876} [2024-06-20 15:54:02,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-20 15:54:02,174 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 876 transitions, 17237 flow [2024-06-20 15:54:02,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:02,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:02,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:02,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:54:02,175 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)] === [2024-06-20 15:54:02,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1420334173, now seen corresponding path program 4 times [2024-06-20 15:54:02,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:02,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418158577] [2024-06-20 15:54:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:03,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418158577] [2024-06-20 15:54:03,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418158577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:03,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:03,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:54:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573917810] [2024-06-20 15:54:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:03,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:54:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:54:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:54:03,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:54:03,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 876 transitions, 17237 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:54:03,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:03,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:54:03,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:05,397 INFO L124 PetriNetUnfolderBase]: 6315/9573 cut-off events. [2024-06-20 15:54:05,397 INFO L125 PetriNetUnfolderBase]: For 1029695/1029708 co-relation queries the response was YES. [2024-06-20 15:54:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97261 conditions, 9573 events. 6315/9573 cut-off events. For 1029695/1029708 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 56327 event pairs, 1653 based on Foata normal form. 13/9574 useless extension candidates. Maximal degree in co-relation 97097. Up to 8589 conditions per place. [2024-06-20 15:54:05,564 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 694 selfloop transitions, 91 changer transitions 0/901 dead transitions. [2024-06-20 15:54:05,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 901 transitions, 19245 flow [2024-06-20 15:54:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:54:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:54:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:54:05,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:54:05,566 INFO L175 Difference]: Start difference. First operand has 352 places, 876 transitions, 17237 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:54:05,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 901 transitions, 19245 flow [2024-06-20 15:54:09,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 901 transitions, 18411 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:09,276 INFO L231 Difference]: Finished difference. Result has 351 places, 880 transitions, 16673 flow [2024-06-20 15:54:09,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16403, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16673, PETRI_PLACES=351, PETRI_TRANSITIONS=880} [2024-06-20 15:54:09,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-20 15:54:09,277 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 880 transitions, 16673 flow [2024-06-20 15:54:09,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:54:09,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:09,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:09,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:54:09,277 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:09,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash 421385863, now seen corresponding path program 12 times [2024-06-20 15:54:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914159562] [2024-06-20 15:54:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:09,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:10,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914159562] [2024-06-20 15:54:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914159562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:10,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366532497] [2024-06-20 15:54:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:10,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:10,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:10,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 880 transitions, 16673 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:10,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:10,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:10,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:12,859 INFO L124 PetriNetUnfolderBase]: 5950/9171 cut-off events. [2024-06-20 15:54:12,859 INFO L125 PetriNetUnfolderBase]: For 1056323/1056343 co-relation queries the response was YES. [2024-06-20 15:54:12,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93940 conditions, 9171 events. 5950/9171 cut-off events. For 1056323/1056343 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 55932 event pairs, 989 based on Foata normal form. 16/9165 useless extension candidates. Maximal degree in co-relation 93776. Up to 7518 conditions per place. [2024-06-20 15:54:13,026 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 627 selfloop transitions, 282 changer transitions 0/929 dead transitions. [2024-06-20 15:54:13,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 929 transitions, 19158 flow [2024-06-20 15:54:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 15:54:13,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-20 15:54:13,028 INFO L175 Difference]: Start difference. First operand has 351 places, 880 transitions, 16673 flow. Second operand 9 states and 187 transitions. [2024-06-20 15:54:13,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 929 transitions, 19158 flow [2024-06-20 15:54:16,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 929 transitions, 18989 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:54:16,848 INFO L231 Difference]: Finished difference. Result has 355 places, 886 transitions, 17246 flow [2024-06-20 15:54:16,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16508, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17246, PETRI_PLACES=355, PETRI_TRANSITIONS=886} [2024-06-20 15:54:16,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-20 15:54:16,849 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 886 transitions, 17246 flow [2024-06-20 15:54:16,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:16,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:16,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:16,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:54:16,850 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)] === [2024-06-20 15:54:16,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:16,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1721029603, now seen corresponding path program 2 times [2024-06-20 15:54:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036634181] [2024-06-20 15:54:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:17,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036634181] [2024-06-20 15:54:17,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036634181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:17,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:17,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086483924] [2024-06-20 15:54:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:17,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:17,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:17,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:54:17,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 886 transitions, 17246 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:17,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:17,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:54:17,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:20,525 INFO L124 PetriNetUnfolderBase]: 6360/9654 cut-off events. [2024-06-20 15:54:20,525 INFO L125 PetriNetUnfolderBase]: For 1040088/1040101 co-relation queries the response was YES. [2024-06-20 15:54:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96992 conditions, 9654 events. 6360/9654 cut-off events. For 1040088/1040101 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 57060 event pairs, 1660 based on Foata normal form. 17/9659 useless extension candidates. Maximal degree in co-relation 96828. Up to 8436 conditions per place. [2024-06-20 15:54:20,682 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 715 selfloop transitions, 96 changer transitions 0/930 dead transitions. [2024-06-20 15:54:20,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 930 transitions, 19752 flow [2024-06-20 15:54:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:54:20,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 15:54:20,683 INFO L175 Difference]: Start difference. First operand has 355 places, 886 transitions, 17246 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:54:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 930 transitions, 19752 flow [2024-06-20 15:54:24,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 930 transitions, 19177 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:24,328 INFO L231 Difference]: Finished difference. Result has 357 places, 890 transitions, 16934 flow [2024-06-20 15:54:24,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16679, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16934, PETRI_PLACES=357, PETRI_TRANSITIONS=890} [2024-06-20 15:54:24,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-20 15:54:24,329 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 890 transitions, 16934 flow [2024-06-20 15:54:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:24,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:24,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:24,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:54:24,329 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:24,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1267264418, now seen corresponding path program 10 times [2024-06-20 15:54:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:24,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957380652] [2024-06-20 15:54:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:25,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957380652] [2024-06-20 15:54:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957380652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:25,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:25,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329146274] [2024-06-20 15:54:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:25,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 890 transitions, 16934 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:25,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:25,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:28,322 INFO L124 PetriNetUnfolderBase]: 6196/9551 cut-off events. [2024-06-20 15:54:28,322 INFO L125 PetriNetUnfolderBase]: For 1070597/1070613 co-relation queries the response was YES. [2024-06-20 15:54:28,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97391 conditions, 9551 events. 6196/9551 cut-off events. For 1070597/1070613 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 58766 event pairs, 1709 based on Foata normal form. 8/9517 useless extension candidates. Maximal degree in co-relation 97227. Up to 7711 conditions per place. [2024-06-20 15:54:28,474 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 651 selfloop transitions, 317 changer transitions 0/988 dead transitions. [2024-06-20 15:54:28,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 988 transitions, 20403 flow [2024-06-20 15:54:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:54:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:54:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-20 15:54:28,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45155038759689925 [2024-06-20 15:54:28,476 INFO L175 Difference]: Start difference. First operand has 357 places, 890 transitions, 16934 flow. Second operand 12 states and 233 transitions. [2024-06-20 15:54:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 988 transitions, 20403 flow [2024-06-20 15:54:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 988 transitions, 20217 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:31,770 INFO L231 Difference]: Finished difference. Result has 367 places, 936 transitions, 18733 flow [2024-06-20 15:54:31,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16751, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18733, PETRI_PLACES=367, PETRI_TRANSITIONS=936} [2024-06-20 15:54:31,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-20 15:54:31,771 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 936 transitions, 18733 flow [2024-06-20 15:54:31,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:31,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:31,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:54:31,772 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:31,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash 421389583, now seen corresponding path program 13 times [2024-06-20 15:54:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147524973] [2024-06-20 15:54:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:32,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147524973] [2024-06-20 15:54:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147524973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:32,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434181696] [2024-06-20 15:54:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:32,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:32,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 936 transitions, 18733 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:32,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:32,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:32,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:35,759 INFO L124 PetriNetUnfolderBase]: 6257/9632 cut-off events. [2024-06-20 15:54:35,759 INFO L125 PetriNetUnfolderBase]: For 1088157/1088175 co-relation queries the response was YES. [2024-06-20 15:54:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100368 conditions, 9632 events. 6257/9632 cut-off events. For 1088157/1088175 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 59197 event pairs, 1290 based on Foata normal form. 14/9621 useless extension candidates. Maximal degree in co-relation 100199. Up to 8469 conditions per place. [2024-06-20 15:54:35,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 726 selfloop transitions, 241 changer transitions 0/987 dead transitions. [2024-06-20 15:54:35,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 987 transitions, 21148 flow [2024-06-20 15:54:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:54:35,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 15:54:35,902 INFO L175 Difference]: Start difference. First operand has 367 places, 936 transitions, 18733 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:54:35,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 987 transitions, 21148 flow [2024-06-20 15:54:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 987 transitions, 20947 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-20 15:54:39,647 INFO L231 Difference]: Finished difference. Result has 371 places, 948 transitions, 19296 flow [2024-06-20 15:54:39,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18532, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19296, PETRI_PLACES=371, PETRI_TRANSITIONS=948} [2024-06-20 15:54:39,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-20 15:54:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 948 transitions, 19296 flow [2024-06-20 15:54:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:39,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:39,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:54:39,649 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:39,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1807280253, now seen corresponding path program 14 times [2024-06-20 15:54:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192957518] [2024-06-20 15:54:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:41,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:41,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192957518] [2024-06-20 15:54:41,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192957518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:41,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:41,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056593081] [2024-06-20 15:54:41,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:41,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:41,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 948 transitions, 19296 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:41,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:43,919 INFO L124 PetriNetUnfolderBase]: 6311/9724 cut-off events. [2024-06-20 15:54:43,919 INFO L125 PetriNetUnfolderBase]: For 1144332/1144348 co-relation queries the response was YES. [2024-06-20 15:54:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102392 conditions, 9724 events. 6311/9724 cut-off events. For 1144332/1144348 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 60221 event pairs, 1873 based on Foata normal form. 8/9680 useless extension candidates. Maximal degree in co-relation 102221. Up to 8889 conditions per place. [2024-06-20 15:54:44,083 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 839 selfloop transitions, 124 changer transitions 0/983 dead transitions. [2024-06-20 15:54:44,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 983 transitions, 21553 flow [2024-06-20 15:54:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 15:54:44,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:54:44,085 INFO L175 Difference]: Start difference. First operand has 371 places, 948 transitions, 19296 flow. Second operand 10 states and 185 transitions. [2024-06-20 15:54:44,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 983 transitions, 21553 flow [2024-06-20 15:54:47,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 983 transitions, 20999 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:47,646 INFO L231 Difference]: Finished difference. Result has 374 places, 954 transitions, 19182 flow [2024-06-20 15:54:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18742, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19182, PETRI_PLACES=374, PETRI_TRANSITIONS=954} [2024-06-20 15:54:47,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-20 15:54:47,647 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 954 transitions, 19182 flow [2024-06-20 15:54:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:54:47,648 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:47,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash 426901848, now seen corresponding path program 11 times [2024-06-20 15:54:47,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190932523] [2024-06-20 15:54:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:48,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:48,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190932523] [2024-06-20 15:54:48,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190932523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:48,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:48,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:48,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970360900] [2024-06-20 15:54:48,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:48,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:49,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:49,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 954 transitions, 19182 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:49,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:49,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:49,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:51,893 INFO L124 PetriNetUnfolderBase]: 6380/9833 cut-off events. [2024-06-20 15:54:51,894 INFO L125 PetriNetUnfolderBase]: For 1148480/1148503 co-relation queries the response was YES. [2024-06-20 15:54:52,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102567 conditions, 9833 events. 6380/9833 cut-off events. For 1148480/1148503 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 60785 event pairs, 1368 based on Foata normal form. 20/9837 useless extension candidates. Maximal degree in co-relation 102395. Up to 8156 conditions per place. [2024-06-20 15:54:52,086 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 725 selfloop transitions, 276 changer transitions 0/1021 dead transitions. [2024-06-20 15:54:52,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1021 transitions, 22226 flow [2024-06-20 15:54:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:54:52,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:54:52,088 INFO L175 Difference]: Start difference. First operand has 374 places, 954 transitions, 19182 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:54:52,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1021 transitions, 22226 flow [2024-06-20 15:54:56,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1021 transitions, 21929 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:56,083 INFO L231 Difference]: Finished difference. Result has 377 places, 972 transitions, 19895 flow [2024-06-20 15:54:56,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18885, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19895, PETRI_PLACES=377, PETRI_TRANSITIONS=972} [2024-06-20 15:54:56,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-20 15:54:56,084 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 972 transitions, 19895 flow [2024-06-20 15:54:56,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:56,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:56,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:56,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:54:56,085 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:54:56,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1801917873, now seen corresponding path program 15 times [2024-06-20 15:54:56,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:56,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426219687] [2024-06-20 15:54:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426219687] [2024-06-20 15:54:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426219687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:57,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409580468] [2024-06-20 15:54:57,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:57,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:57,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:54:57,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 972 transitions, 19895 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:57,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:57,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:54:57,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:00,940 INFO L124 PetriNetUnfolderBase]: 6461/9956 cut-off events. [2024-06-20 15:55:00,941 INFO L125 PetriNetUnfolderBase]: For 1211214/1211230 co-relation queries the response was YES. [2024-06-20 15:55:01,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105432 conditions, 9956 events. 6461/9956 cut-off events. For 1211214/1211230 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 61894 event pairs, 1908 based on Foata normal form. 10/9911 useless extension candidates. Maximal degree in co-relation 105259. Up to 9099 conditions per place. [2024-06-20 15:55:01,089 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 866 selfloop transitions, 122 changer transitions 0/1008 dead transitions. [2024-06-20 15:55:01,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1008 transitions, 22262 flow [2024-06-20 15:55:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 15:55:01,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-20 15:55:01,090 INFO L175 Difference]: Start difference. First operand has 377 places, 972 transitions, 19895 flow. Second operand 10 states and 183 transitions. [2024-06-20 15:55:01,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1008 transitions, 22262 flow [2024-06-20 15:55:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1008 transitions, 21678 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:04,925 INFO L231 Difference]: Finished difference. Result has 381 places, 980 transitions, 19818 flow [2024-06-20 15:55:04,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19311, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19818, PETRI_PLACES=381, PETRI_TRANSITIONS=980} [2024-06-20 15:55:04,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-20 15:55:04,926 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 980 transitions, 19818 flow [2024-06-20 15:55:04,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:04,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:04,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:55:04,926 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:04,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1801710328, now seen corresponding path program 12 times [2024-06-20 15:55:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:04,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685423949] [2024-06-20 15:55:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:06,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:06,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685423949] [2024-06-20 15:55:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685423949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:06,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:06,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:06,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125928268] [2024-06-20 15:55:06,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:06,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:06,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:55:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 980 transitions, 19818 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:55:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:09,450 INFO L124 PetriNetUnfolderBase]: 6481/9996 cut-off events. [2024-06-20 15:55:09,451 INFO L125 PetriNetUnfolderBase]: For 1208855/1208878 co-relation queries the response was YES. [2024-06-20 15:55:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104618 conditions, 9996 events. 6481/9996 cut-off events. For 1208855/1208878 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 62169 event pairs, 1372 based on Foata normal form. 20/10000 useless extension candidates. Maximal degree in co-relation 104444. Up to 8307 conditions per place. [2024-06-20 15:55:09,618 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 735 selfloop transitions, 281 changer transitions 0/1036 dead transitions. [2024-06-20 15:55:09,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1036 transitions, 22775 flow [2024-06-20 15:55:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:55:09,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:55:09,620 INFO L175 Difference]: Start difference. First operand has 381 places, 980 transitions, 19818 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:55:09,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1036 transitions, 22775 flow [2024-06-20 15:55:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1036 transitions, 22444 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:13,485 INFO L231 Difference]: Finished difference. Result has 383 places, 992 transitions, 20432 flow [2024-06-20 15:55:13,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19487, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20432, PETRI_PLACES=383, PETRI_TRANSITIONS=992} [2024-06-20 15:55:13,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-20 15:55:13,486 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 992 transitions, 20432 flow [2024-06-20 15:55:13,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:13,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:13,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:55:13,486 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:13,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -453554360, now seen corresponding path program 13 times [2024-06-20 15:55:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827685901] [2024-06-20 15:55:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827685901] [2024-06-20 15:55:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827685901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:14,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617198679] [2024-06-20 15:55:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:14,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:55:14,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 992 transitions, 20432 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:14,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:14,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:55:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:17,937 INFO L124 PetriNetUnfolderBase]: 6583/10140 cut-off events. [2024-06-20 15:55:17,937 INFO L125 PetriNetUnfolderBase]: For 1258280/1258303 co-relation queries the response was YES. [2024-06-20 15:55:18,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107736 conditions, 10140 events. 6583/10140 cut-off events. For 1258280/1258303 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 63119 event pairs, 1330 based on Foata normal form. 20/10142 useless extension candidates. Maximal degree in co-relation 107561. Up to 8243 conditions per place. [2024-06-20 15:55:18,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 705 selfloop transitions, 328 changer transitions 0/1053 dead transitions. [2024-06-20 15:55:18,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1053 transitions, 23518 flow [2024-06-20 15:55:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 15:55:18,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-20 15:55:18,100 INFO L175 Difference]: Start difference. First operand has 383 places, 992 transitions, 20432 flow. Second operand 9 states and 187 transitions. [2024-06-20 15:55:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1053 transitions, 23518 flow [2024-06-20 15:55:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1053 transitions, 22774 flow, removed 99 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:22,608 INFO L231 Difference]: Finished difference. Result has 384 places, 1004 transitions, 20756 flow [2024-06-20 15:55:22,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19692, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20756, PETRI_PLACES=384, PETRI_TRANSITIONS=1004} [2024-06-20 15:55:22,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-20 15:55:22,609 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 1004 transitions, 20756 flow [2024-06-20 15:55:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:22,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:22,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:55:22,609 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)] === [2024-06-20 15:55:22,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1872377341, now seen corresponding path program 5 times [2024-06-20 15:55:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658294029] [2024-06-20 15:55:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:23,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:23,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658294029] [2024-06-20 15:55:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658294029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:23,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:23,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:55:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423074247] [2024-06-20 15:55:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:55:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:55:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:55:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:55:23,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1004 transitions, 20756 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:55:23,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:23,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:55:23,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:26,865 INFO L124 PetriNetUnfolderBase]: 7151/10871 cut-off events. [2024-06-20 15:55:26,865 INFO L125 PetriNetUnfolderBase]: For 1265480/1265526 co-relation queries the response was YES. [2024-06-20 15:55:26,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112184 conditions, 10871 events. 7151/10871 cut-off events. For 1265480/1265526 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 66216 event pairs, 2391 based on Foata normal form. 42/10880 useless extension candidates. Maximal degree in co-relation 112009. Up to 9874 conditions per place. [2024-06-20 15:55:27,049 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 838 selfloop transitions, 75 changer transitions 0/1045 dead transitions. [2024-06-20 15:55:27,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1045 transitions, 23362 flow [2024-06-20 15:55:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:55:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:55:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 15:55:27,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-20 15:55:27,050 INFO L175 Difference]: Start difference. First operand has 384 places, 1004 transitions, 20756 flow. Second operand 8 states and 139 transitions. [2024-06-20 15:55:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1045 transitions, 23362 flow [2024-06-20 15:55:31,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1045 transitions, 22505 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:31,292 INFO L231 Difference]: Finished difference. Result has 386 places, 1027 transitions, 20503 flow [2024-06-20 15:55:31,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19899, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=935, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20503, PETRI_PLACES=386, PETRI_TRANSITIONS=1027} [2024-06-20 15:55:31,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-20 15:55:31,294 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1027 transitions, 20503 flow [2024-06-20 15:55:31,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 15:55:31,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:31,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:55:31,294 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:31,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1641478076, now seen corresponding path program 14 times [2024-06-20 15:55:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693860085] [2024-06-20 15:55:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:32,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693860085] [2024-06-20 15:55:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693860085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:32,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:32,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420265114] [2024-06-20 15:55:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:32,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:55:32,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1027 transitions, 20503 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:32,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:32,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:55:32,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:35,779 INFO L124 PetriNetUnfolderBase]: 6730/10354 cut-off events. [2024-06-20 15:55:35,780 INFO L125 PetriNetUnfolderBase]: For 1307237/1307253 co-relation queries the response was YES. [2024-06-20 15:55:35,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108944 conditions, 10354 events. 6730/10354 cut-off events. For 1307237/1307253 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 64751 event pairs, 1983 based on Foata normal form. 12/10324 useless extension candidates. Maximal degree in co-relation 108767. Up to 9429 conditions per place. [2024-06-20 15:55:35,937 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 950 selfloop transitions, 102 changer transitions 0/1079 dead transitions. [2024-06-20 15:55:35,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1079 transitions, 23547 flow [2024-06-20 15:55:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:55:35,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 15:55:35,939 INFO L175 Difference]: Start difference. First operand has 386 places, 1027 transitions, 20503 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:55:35,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1079 transitions, 23547 flow [2024-06-20 15:55:39,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1079 transitions, 23432 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 15:55:39,954 INFO L231 Difference]: Finished difference. Result has 391 places, 1039 transitions, 21015 flow [2024-06-20 15:55:39,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20388, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21015, PETRI_PLACES=391, PETRI_TRANSITIONS=1039} [2024-06-20 15:55:39,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-20 15:55:39,958 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1039 transitions, 21015 flow [2024-06-20 15:55:39,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:39,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:39,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:39,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:55:39,958 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:39,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1641276266, now seen corresponding path program 15 times [2024-06-20 15:55:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:39,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424686079] [2024-06-20 15:55:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:39,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424686079] [2024-06-20 15:55:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424686079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:41,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:41,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070490504] [2024-06-20 15:55:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:41,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:55:41,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1039 transitions, 21015 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:41,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:41,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:55:41,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:44,645 INFO L124 PetriNetUnfolderBase]: 6732/10356 cut-off events. [2024-06-20 15:55:44,645 INFO L125 PetriNetUnfolderBase]: For 1327276/1327292 co-relation queries the response was YES. [2024-06-20 15:55:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109331 conditions, 10356 events. 6732/10356 cut-off events. For 1327276/1327292 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 64696 event pairs, 2034 based on Foata normal form. 12/10328 useless extension candidates. Maximal degree in co-relation 109153. Up to 9450 conditions per place. [2024-06-20 15:55:44,809 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 962 selfloop transitions, 109 changer transitions 0/1098 dead transitions. [2024-06-20 15:55:44,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1098 transitions, 24553 flow [2024-06-20 15:55:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:55:44,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:55:44,811 INFO L175 Difference]: Start difference. First operand has 391 places, 1039 transitions, 21015 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:55:44,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1098 transitions, 24553 flow [2024-06-20 15:55:49,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1098 transitions, 23809 flow, removed 137 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:49,389 INFO L231 Difference]: Finished difference. Result has 393 places, 1056 transitions, 21107 flow [2024-06-20 15:55:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20295, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21107, PETRI_PLACES=393, PETRI_TRANSITIONS=1056} [2024-06-20 15:55:49,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-20 15:55:49,390 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1056 transitions, 21107 flow [2024-06-20 15:55:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:49,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:49,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:55:49,391 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:49,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash 681652371, now seen corresponding path program 16 times [2024-06-20 15:55:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349749026] [2024-06-20 15:55:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:49,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:50,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349749026] [2024-06-20 15:55:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349749026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:50,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:55:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111661060] [2024-06-20 15:55:50,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:55:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:55:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:55:50,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:55:50,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1056 transitions, 21107 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:50,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:50,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:55:50,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:54,341 INFO L124 PetriNetUnfolderBase]: 6751/10387 cut-off events. [2024-06-20 15:55:54,342 INFO L125 PetriNetUnfolderBase]: For 1326723/1326739 co-relation queries the response was YES. [2024-06-20 15:55:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109183 conditions, 10387 events. 6751/10387 cut-off events. For 1326723/1326739 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 64959 event pairs, 2057 based on Foata normal form. 12/10356 useless extension candidates. Maximal degree in co-relation 109003. Up to 9721 conditions per place. [2024-06-20 15:55:54,504 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 1010 selfloop transitions, 46 changer transitions 0/1083 dead transitions. [2024-06-20 15:55:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1083 transitions, 23370 flow [2024-06-20 15:55:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:55:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:55:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:55:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-20 15:55:54,505 INFO L175 Difference]: Start difference. First operand has 393 places, 1056 transitions, 21107 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:55:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1083 transitions, 23370 flow [2024-06-20 15:55:59,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1083 transitions, 22876 flow, removed 185 selfloop flow, removed 5 redundant places. [2024-06-20 15:55:59,329 INFO L231 Difference]: Finished difference. Result has 397 places, 1056 transitions, 20721 flow [2024-06-20 15:55:59,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20613, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20721, PETRI_PLACES=397, PETRI_TRANSITIONS=1056} [2024-06-20 15:55:59,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-20 15:55:59,329 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1056 transitions, 20721 flow [2024-06-20 15:55:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:59,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:59,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:59,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:55:59,330 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:55:59,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 681652526, now seen corresponding path program 16 times [2024-06-20 15:55:59,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:59,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587091797] [2024-06-20 15:55:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:59,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:00,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587091797] [2024-06-20 15:56:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587091797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:00,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:56:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655622245] [2024-06-20 15:56:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:56:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:56:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:56:00,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:56:00,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1056 transitions, 20721 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:00,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:00,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:56:00,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:04,138 INFO L124 PetriNetUnfolderBase]: 6817/10495 cut-off events. [2024-06-20 15:56:04,138 INFO L125 PetriNetUnfolderBase]: For 1363786/1363802 co-relation queries the response was YES. [2024-06-20 15:56:04,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110276 conditions, 10495 events. 6817/10495 cut-off events. For 1363786/1363802 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 65788 event pairs, 1957 based on Foata normal form. 12/10465 useless extension candidates. Maximal degree in co-relation 110095. Up to 9377 conditions per place. [2024-06-20 15:56:04,344 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 942 selfloop transitions, 145 changer transitions 0/1114 dead transitions. [2024-06-20 15:56:04,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1114 transitions, 23930 flow [2024-06-20 15:56:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:56:04,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 15:56:04,345 INFO L175 Difference]: Start difference. First operand has 397 places, 1056 transitions, 20721 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:56:04,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1114 transitions, 23930 flow