./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_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/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix006_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix006_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-cde23df-m [2024-06-14 11:50:52,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:50:52,990 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:50:52,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:50:52,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:50:53,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:50:53,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:50:53,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:50:53,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:50:53,025 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:50:53,025 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:50:53,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:50:53,026 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:50:53,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:50:53,027 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:50:53,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:50:53,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:50:53,028 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:50:53,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:50:53,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:50:53,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:50:53,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:50:53,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:50:53,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:50:53,029 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:50:53,029 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:50:53,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:50:53,030 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:50:53,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:50:53,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:50:53,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:50:53,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:50:53,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:50:53,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:50:53,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:50:53,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:50:53,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:50:53,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:50:53,033 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:50:53,033 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:50:53,033 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:50:53,033 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:50:53,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:50:53,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:50:53,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:50:53,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:50:53,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:50:53,275 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:50:53,276 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:50:53,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 11:50:53,517 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:50:53,518 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:50:53,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:50:54,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:50:54,771 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:50:54,774 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:50:54,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982e9d2c5/aea48f5767694fc18212834f711017a4/FLAG2c0627b15 [2024-06-14 11:50:54,806 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982e9d2c5/aea48f5767694fc18212834f711017a4 [2024-06-14 11:50:54,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:50:54,807 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:50:54,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:50:54,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:50:54,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:50:54,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:53" (1/2) ... [2024-06-14 11:50:54,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f655b0d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:50:54, skipping insertion in model container [2024-06-14 11:50:54,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:53" (1/2) ... [2024-06-14 11:50:54,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8976dd7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:50:54, skipping insertion in model container [2024-06-14 11:50:54,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:50:54" (2/2) ... [2024-06-14 11:50:54,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f655b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:54, skipping insertion in model container [2024-06-14 11:50:54,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:50:54" (2/2) ... [2024-06-14 11:50:54,816 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:50:54,909 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:50:54,910 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 11:50:54,910 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 11:50:54,911 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 11:50:54,911 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:50:54,911 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-14 11:50:54,950 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:50:55,258 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:50:55,269 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:50:55,392 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:50:55,429 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:50:55,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55 WrapperNode [2024-06-14 11:50:55,429 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:50:55,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:50:55,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:50:55,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:50:55,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,483 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-14 11:50:55,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:50:55,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:50:55,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:50:55,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:50:55,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,517 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]. [2024-06-14 11:50:55,522 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:50:55,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:50:55,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:50:55,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:50:55,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (1/1) ... [2024-06-14 11:50:55,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:50:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:50:55,579 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) [2024-06-14 11:50:55,594 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 [2024-06-14 11:50:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:50:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:50:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:50:55,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:50:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:50:55,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:50:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:50:55,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:50:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:50:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:50:55,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:50:55,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:50:55,620 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:50:55,754 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:50:55,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:50:56,077 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:50:56,078 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:50:56,204 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:50:56,204 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:50:56,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:50:56 BoogieIcfgContainer [2024-06-14 11:50:56,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:50:56,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:50:56,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:50:56,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:50:56,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:53" (1/4) ... [2024-06-14 11:50:56,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13834292 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:50:56, skipping insertion in model container [2024-06-14 11:50:56,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:50:54" (2/4) ... [2024-06-14 11:50:56,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13834292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:50:56, skipping insertion in model container [2024-06-14 11:50:56,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:55" (3/4) ... [2024-06-14 11:50:56,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13834292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:50:56, skipping insertion in model container [2024-06-14 11:50:56,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:50:56" (4/4) ... [2024-06-14 11:50:56,211 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 11:50:56,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:50:56,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:50:56,225 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:50:56,257 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:50:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:50:56,299 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 11:50:56,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:50:56,302 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 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:50:56,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:50:56,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 11:50:56,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:50:56,315 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;@713670a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:50:56,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:50:56,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:50:56,318 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:50:56,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:50:56,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:56,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:50:56,320 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)] === [2024-06-14 11:50:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1196790121, now seen corresponding path program 1 times [2024-06-14 11:50:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318475159] [2024-06-14 11:50:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318475159] [2024-06-14 11:50:57,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318475159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:57,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:57,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:50:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019585482] [2024-06-14 11:50:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:50:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:57,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:50:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:50:57,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:50:57,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:57,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:57,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:50:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:57,919 INFO L124 PetriNetUnfolderBase]: 1363/2136 cut-off events. [2024-06-14 11:50:57,919 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 11:50:57,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4262 conditions, 2136 events. 1363/2136 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10680 event pairs, 964 based on Foata normal form. 1/2084 useless extension candidates. Maximal degree in co-relation 4247. Up to 2037 conditions per place. [2024-06-14 11:50:57,933 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 11:50:57,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 179 flow [2024-06-14 11:50:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:50:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:50:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-14 11:50:57,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 11:50:57,944 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 77 transitions. [2024-06-14 11:50:57,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 179 flow [2024-06-14 11:50:57,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:57,950 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 11:50:57,952 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} [2024-06-14 11:50:57,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 11:50:57,955 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 11:50:57,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:57,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:57,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:50:57,955 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)] === [2024-06-14 11:50:57,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 935955318, now seen corresponding path program 1 times [2024-06-14 11:50:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:57,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151468739] [2024-06-14 11:50:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:58,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:58,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151468739] [2024-06-14 11:50:58,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151468739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:50:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252297058] [2024-06-14 11:50:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:58,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:50:58,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:58,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:50:58,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:50:58,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:50:58,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:58,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:58,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:50:58,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:58,900 INFO L124 PetriNetUnfolderBase]: 1357/2137 cut-off events. [2024-06-14 11:50:58,901 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2024-06-14 11:50:58,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2137 events. 1357/2137 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10734 event pairs, 840 based on Foata normal form. 3/2126 useless extension candidates. Maximal degree in co-relation 4791. Up to 2013 conditions per place. [2024-06-14 11:50:58,935 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 11:50:58,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-14 11:50:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:50:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:50:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-14 11:50:58,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 11:50:58,937 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-14 11:50:58,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-14 11:50:58,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:50:58,938 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 11:50:58,938 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} [2024-06-14 11:50:58,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 11:50:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 11:50:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:58,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:50:58,940 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)] === [2024-06-14 11:50:58,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1050155332, now seen corresponding path program 1 times [2024-06-14 11:50:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368025693] [2024-06-14 11:50:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368025693] [2024-06-14 11:50:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368025693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:50:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175071564] [2024-06-14 11:50:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:50:59,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:50:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:50:59,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:59,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:59,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:59,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:59,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:59,913 INFO L124 PetriNetUnfolderBase]: 1661/2581 cut-off events. [2024-06-14 11:50:59,913 INFO L125 PetriNetUnfolderBase]: For 1347/1347 co-relation queries the response was YES. [2024-06-14 11:50:59,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 2581 events. 1661/2581 cut-off events. For 1347/1347 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12726 event pairs, 812 based on Foata normal form. 5/2583 useless extension candidates. Maximal degree in co-relation 6392. Up to 2387 conditions per place. [2024-06-14 11:50:59,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 11:50:59,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 402 flow [2024-06-14 11:50:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:50:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:50:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 11:50:59,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:50:59,927 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 125 transitions. [2024-06-14 11:50:59,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 402 flow [2024-06-14 11:50:59,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:50:59,930 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 11:50:59,930 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} [2024-06-14 11:50:59,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 11:50:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 11:50:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:59,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:59,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:50:59,931 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)] === [2024-06-14 11:50:59,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1804923989, now seen corresponding path program 1 times [2024-06-14 11:50:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933121780] [2024-06-14 11:50:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:00,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:00,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933121780] [2024-06-14 11:51:00,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933121780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:00,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:00,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:51:00,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166393675] [2024-06-14 11:51:00,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:00,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:51:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:51:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:51:00,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:00,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 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) [2024-06-14 11:51:00,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:00,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:01,148 INFO L124 PetriNetUnfolderBase]: 1669/2593 cut-off events. [2024-06-14 11:51:01,148 INFO L125 PetriNetUnfolderBase]: For 3112/3115 co-relation queries the response was YES. [2024-06-14 11:51:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7528 conditions, 2593 events. 1669/2593 cut-off events. For 3112/3115 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12804 event pairs, 666 based on Foata normal form. 7/2597 useless extension candidates. Maximal degree in co-relation 7508. Up to 2373 conditions per place. [2024-06-14 11:51:01,161 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 62 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-14 11:51:01,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 529 flow [2024-06-14 11:51:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:51:01,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-06-14 11:51:01,162 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:51:01,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 529 flow [2024-06-14 11:51:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:51:01,166 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 312 flow [2024-06-14 11:51:01,166 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} [2024-06-14 11:51:01,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 11:51:01,166 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 312 flow [2024-06-14 11:51:01,167 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) [2024-06-14 11:51:01,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:01,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:51:01,167 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)] === [2024-06-14 11:51:01,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1600273951, now seen corresponding path program 1 times [2024-06-14 11:51:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:01,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804650510] [2024-06-14 11:51:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:02,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804650510] [2024-06-14 11:51:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804650510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660792233] [2024-06-14 11:51:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:02,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:02,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:02,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 312 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) [2024-06-14 11:51:02,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:02,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:02,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:02,574 INFO L124 PetriNetUnfolderBase]: 1681/2613 cut-off events. [2024-06-14 11:51:02,575 INFO L125 PetriNetUnfolderBase]: For 4913/4916 co-relation queries the response was YES. [2024-06-14 11:51:02,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8399 conditions, 2613 events. 1681/2613 cut-off events. For 4913/4916 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12928 event pairs, 502 based on Foata normal form. 12/2622 useless extension candidates. Maximal degree in co-relation 8376. Up to 2341 conditions per place. [2024-06-14 11:51:02,589 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 66 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-14 11:51:02,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 630 flow [2024-06-14 11:51:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:51:02,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481727574750831 [2024-06-14 11:51:02,590 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 312 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:51:02,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 630 flow [2024-06-14 11:51:02,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 581 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:02,594 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-14 11:51:02,595 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} [2024-06-14 11:51:02,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 11:51:02,595 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-14 11:51:02,595 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) [2024-06-14 11:51:02,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:02,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:51:02,596 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)] === [2024-06-14 11:51:02,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -260451754, now seen corresponding path program 1 times [2024-06-14 11:51:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:02,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384790290] [2024-06-14 11:51:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:03,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:03,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384790290] [2024-06-14 11:51:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384790290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:03,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:51:03,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931572115] [2024-06-14 11:51:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:51:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:51:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:51:03,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:03,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:03,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:03,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:03,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:03,630 INFO L124 PetriNetUnfolderBase]: 1676/2601 cut-off events. [2024-06-14 11:51:03,630 INFO L125 PetriNetUnfolderBase]: For 6653/6653 co-relation queries the response was YES. [2024-06-14 11:51:03,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8920 conditions, 2601 events. 1676/2601 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12812 event pairs, 659 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 8896. Up to 2484 conditions per place. [2024-06-14 11:51:03,644 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 55 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-14 11:51:03,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 493 flow [2024-06-14 11:51:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:51:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:51:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 11:51:03,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-14 11:51:03,646 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 5 states and 97 transitions. [2024-06-14 11:51:03,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 493 flow [2024-06-14 11:51:03,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 429 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:03,650 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 299 flow [2024-06-14 11:51:03,650 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=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-14 11:51:03,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 11:51:03,651 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 299 flow [2024-06-14 11:51:03,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:03,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:03,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:03,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:51:03,652 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)] === [2024-06-14 11:51:03,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 515008966, now seen corresponding path program 1 times [2024-06-14 11:51:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369868595] [2024-06-14 11:51:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:04,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:04,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369868595] [2024-06-14 11:51:04,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369868595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:04,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:04,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036909493] [2024-06-14 11:51:04,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:04,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:04,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:04,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:04,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:04,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:04,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:04,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:04,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:04,882 INFO L124 PetriNetUnfolderBase]: 1666/2624 cut-off events. [2024-06-14 11:51:04,883 INFO L125 PetriNetUnfolderBase]: For 7738/7738 co-relation queries the response was YES. [2024-06-14 11:51:04,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8907 conditions, 2624 events. 1666/2624 cut-off events. For 7738/7738 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13116 event pairs, 623 based on Foata normal form. 4/2626 useless extension candidates. Maximal degree in co-relation 8881. Up to 2452 conditions per place. [2024-06-14 11:51:04,895 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-14 11:51:04,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 501 flow [2024-06-14 11:51:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 11:51:04,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 11:51:04,897 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-14 11:51:04,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 501 flow [2024-06-14 11:51:04,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:04,901 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 333 flow [2024-06-14 11:51:04,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 11:51:04,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 11:51:04,902 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 333 flow [2024-06-14 11:51:04,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:04,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:04,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:04,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:51:04,903 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)] === [2024-06-14 11:51:04,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash -60073543, now seen corresponding path program 1 times [2024-06-14 11:51:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798431223] [2024-06-14 11:51:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:05,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:05,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798431223] [2024-06-14 11:51:05,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798431223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:05,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:05,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:05,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545028394] [2024-06-14 11:51:05,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:05,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:05,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:05,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:05,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:05,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:06,025 INFO L124 PetriNetUnfolderBase]: 1672/2629 cut-off events. [2024-06-14 11:51:06,028 INFO L125 PetriNetUnfolderBase]: For 9654/9660 co-relation queries the response was YES. [2024-06-14 11:51:06,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9504 conditions, 2629 events. 1672/2629 cut-off events. For 9654/9660 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13111 event pairs, 636 based on Foata normal form. 8/2634 useless extension candidates. Maximal degree in co-relation 9478. Up to 2404 conditions per place. [2024-06-14 11:51:06,046 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-14 11:51:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 589 flow [2024-06-14 11:51:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 11:51:06,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 11:51:06,049 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 333 flow. Second operand 6 states and 123 transitions. [2024-06-14 11:51:06,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 589 flow [2024-06-14 11:51:06,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:06,058 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 373 flow [2024-06-14 11:51:06,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-14 11:51:06,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-14 11:51:06,061 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 373 flow [2024-06-14 11:51:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:06,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:06,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:51:06,062 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)] === [2024-06-14 11:51:06,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1185277725, now seen corresponding path program 2 times [2024-06-14 11:51:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:06,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151978357] [2024-06-14 11:51:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:06,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151978357] [2024-06-14 11:51:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151978357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:06,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:06,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:06,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915949380] [2024-06-14 11:51:06,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:06,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 373 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:06,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:07,256 INFO L124 PetriNetUnfolderBase]: 1657/2603 cut-off events. [2024-06-14 11:51:07,257 INFO L125 PetriNetUnfolderBase]: For 11091/11091 co-relation queries the response was YES. [2024-06-14 11:51:07,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9666 conditions, 2603 events. 1657/2603 cut-off events. For 11091/11091 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12981 event pairs, 632 based on Foata normal form. 2/2603 useless extension candidates. Maximal degree in co-relation 9639. Up to 2445 conditions per place. [2024-06-14 11:51:07,271 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-14 11:51:07,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 557 flow [2024-06-14 11:51:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 11:51:07,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:51:07,272 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 373 flow. Second operand 6 states and 114 transitions. [2024-06-14 11:51:07,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 557 flow [2024-06-14 11:51:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:07,279 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 374 flow [2024-06-14 11:51:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-14 11:51:07,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 11:51:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 374 flow [2024-06-14 11:51:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:07,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:07,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:51:07,280 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)] === [2024-06-14 11:51:07,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash -30264087, now seen corresponding path program 1 times [2024-06-14 11:51:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:07,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007431654] [2024-06-14 11:51:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007431654] [2024-06-14 11:51:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007431654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575722085] [2024-06-14 11:51:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:08,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:08,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 374 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) [2024-06-14 11:51:08,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:08,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:08,624 INFO L124 PetriNetUnfolderBase]: 1733/2709 cut-off events. [2024-06-14 11:51:08,625 INFO L125 PetriNetUnfolderBase]: For 13738/13744 co-relation queries the response was YES. [2024-06-14 11:51:08,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10297 conditions, 2709 events. 1733/2709 cut-off events. For 13738/13744 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13462 event pairs, 559 based on Foata normal form. 9/2714 useless extension candidates. Maximal degree in co-relation 10269. Up to 2371 conditions per place. [2024-06-14 11:51:08,637 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 69 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-14 11:51:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 730 flow [2024-06-14 11:51:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 11:51:08,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-14 11:51:08,639 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 374 flow. Second operand 7 states and 145 transitions. [2024-06-14 11:51:08,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 730 flow [2024-06-14 11:51:08,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 683 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:08,646 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 470 flow [2024-06-14 11:51:08,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=470, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-14 11:51:08,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-14 11:51:08,647 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 470 flow [2024-06-14 11:51:08,648 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) [2024-06-14 11:51:08,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:08,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:51:08,648 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)] === [2024-06-14 11:51:08,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1888991397, now seen corresponding path program 2 times [2024-06-14 11:51:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:08,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831881804] [2024-06-14 11:51:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:08,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:09,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831881804] [2024-06-14 11:51:09,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831881804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:09,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875834878] [2024-06-14 11:51:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:09,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:09,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 470 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) [2024-06-14 11:51:09,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:09,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:09,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:09,842 INFO L124 PetriNetUnfolderBase]: 1755/2751 cut-off events. [2024-06-14 11:51:09,842 INFO L125 PetriNetUnfolderBase]: For 16951/16951 co-relation queries the response was YES. [2024-06-14 11:51:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11403 conditions, 2751 events. 1755/2751 cut-off events. For 16951/16951 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13683 event pairs, 581 based on Foata normal form. 4/2753 useless extension candidates. Maximal degree in co-relation 11373. Up to 2569 conditions per place. [2024-06-14 11:51:09,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-14 11:51:09,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 734 flow [2024-06-14 11:51:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:51:09,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 11:51:09,857 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 470 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:51:09,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 734 flow [2024-06-14 11:51:09,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 96 transitions, 706 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:09,867 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 514 flow [2024-06-14 11:51:09,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 11:51:09,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 11:51:09,867 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 514 flow [2024-06-14 11:51:09,868 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) [2024-06-14 11:51:09,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:09,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:51:09,868 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)] === [2024-06-14 11:51:09,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 146867433, now seen corresponding path program 3 times [2024-06-14 11:51:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109308083] [2024-06-14 11:51:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:10,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:10,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109308083] [2024-06-14 11:51:10,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109308083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:10,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655702858] [2024-06-14 11:51:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:10,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:10,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:10,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:10,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 514 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) [2024-06-14 11:51:10,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:10,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:10,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:11,209 INFO L124 PetriNetUnfolderBase]: 1745/2737 cut-off events. [2024-06-14 11:51:11,209 INFO L125 PetriNetUnfolderBase]: For 19747/19747 co-relation queries the response was YES. [2024-06-14 11:51:11,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 2737 events. 1745/2737 cut-off events. For 19747/19747 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13635 event pairs, 579 based on Foata normal form. 4/2739 useless extension candidates. Maximal degree in co-relation 11625. Up to 2528 conditions per place. [2024-06-14 11:51:11,256 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-06-14 11:51:11,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 796 flow [2024-06-14 11:51:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 11:51:11,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 11:51:11,258 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 514 flow. Second operand 7 states and 135 transitions. [2024-06-14 11:51:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 796 flow [2024-06-14 11:51:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 748 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:11,277 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 554 flow [2024-06-14 11:51:11,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-14 11:51:11,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 11:51:11,278 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 554 flow [2024-06-14 11:51:11,278 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) [2024-06-14 11:51:11,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:11,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:11,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:51:11,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:11,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -640109680, now seen corresponding path program 1 times [2024-06-14 11:51:11,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844399755] [2024-06-14 11:51:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844399755] [2024-06-14 11:51:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844399755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:11,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:11,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:51:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585642580] [2024-06-14 11:51:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:51:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:51:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:51:11,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:11,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:11,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:11,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:11,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:12,385 INFO L124 PetriNetUnfolderBase]: 2232/3359 cut-off events. [2024-06-14 11:51:12,385 INFO L125 PetriNetUnfolderBase]: For 29575/29575 co-relation queries the response was YES. [2024-06-14 11:51:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 3359 events. 2232/3359 cut-off events. For 29575/29575 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15937 event pairs, 812 based on Foata normal form. 1/3358 useless extension candidates. Maximal degree in co-relation 14789. Up to 3263 conditions per place. [2024-06-14 11:51:12,404 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 72 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-14 11:51:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 756 flow [2024-06-14 11:51:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:51:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:51:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 11:51:12,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 11:51:12,405 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 554 flow. Second operand 5 states and 89 transitions. [2024-06-14 11:51:12,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 756 flow [2024-06-14 11:51:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 696 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:12,419 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 544 flow [2024-06-14 11:51:12,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-14 11:51:12,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 11:51:12,420 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 544 flow [2024-06-14 11:51:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:12,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:12,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:12,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:51:12,421 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)] === [2024-06-14 11:51:12,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1896211910, now seen corresponding path program 1 times [2024-06-14 11:51:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:12,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217217486] [2024-06-14 11:51:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:13,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:13,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217217486] [2024-06-14 11:51:13,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217217486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:13,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:13,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:13,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524743377] [2024-06-14 11:51:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:13,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:13,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:13,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:13,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:13,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:13,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:13,963 INFO L124 PetriNetUnfolderBase]: 1830/2835 cut-off events. [2024-06-14 11:51:13,963 INFO L125 PetriNetUnfolderBase]: For 28879/28882 co-relation queries the response was YES. [2024-06-14 11:51:13,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13196 conditions, 2835 events. 1830/2835 cut-off events. For 28879/28882 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14110 event pairs, 603 based on Foata normal form. 4/2836 useless extension candidates. Maximal degree in co-relation 13162. Up to 2556 conditions per place. [2024-06-14 11:51:13,982 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-14 11:51:13,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 862 flow [2024-06-14 11:51:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:51:13,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 11:51:13,984 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 544 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:51:13,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 862 flow [2024-06-14 11:51:13,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 114 transitions, 834 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:13,998 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 611 flow [2024-06-14 11:51:13,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=611, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-14 11:51:13,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 11:51:13,999 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 611 flow [2024-06-14 11:51:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:13,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:14,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:14,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:51:14,000 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)] === [2024-06-14 11:51:14,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1896063885, now seen corresponding path program 1 times [2024-06-14 11:51:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645140304] [2024-06-14 11:51:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645140304] [2024-06-14 11:51:14,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645140304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:14,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896009417] [2024-06-14 11:51:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:14,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 611 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:14,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:15,221 INFO L124 PetriNetUnfolderBase]: 1852/2866 cut-off events. [2024-06-14 11:51:15,222 INFO L125 PetriNetUnfolderBase]: For 33303/33306 co-relation queries the response was YES. [2024-06-14 11:51:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14005 conditions, 2866 events. 1852/2866 cut-off events. For 33303/33306 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14281 event pairs, 573 based on Foata normal form. 4/2866 useless extension candidates. Maximal degree in co-relation 13970. Up to 2478 conditions per place. [2024-06-14 11:51:15,263 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 36 changer transitions 0/118 dead transitions. [2024-06-14 11:51:15,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1005 flow [2024-06-14 11:51:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 11:51:15,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-14 11:51:15,265 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 611 flow. Second operand 7 states and 149 transitions. [2024-06-14 11:51:15,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1005 flow [2024-06-14 11:51:15,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 936 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:15,283 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 658 flow [2024-06-14 11:51:15,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-14 11:51:15,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 11:51:15,284 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 658 flow [2024-06-14 11:51:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:15,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:15,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:15,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:51:15,285 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:15,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1896058305, now seen corresponding path program 2 times [2024-06-14 11:51:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:15,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320752627] [2024-06-14 11:51:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:15,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320752627] [2024-06-14 11:51:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320752627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:16,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69288791] [2024-06-14 11:51:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 658 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) [2024-06-14 11:51:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:16,923 INFO L124 PetriNetUnfolderBase]: 1874/2898 cut-off events. [2024-06-14 11:51:16,923 INFO L125 PetriNetUnfolderBase]: For 37559/37562 co-relation queries the response was YES. [2024-06-14 11:51:16,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14515 conditions, 2898 events. 1874/2898 cut-off events. For 37559/37562 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14449 event pairs, 580 based on Foata normal form. 4/2898 useless extension candidates. Maximal degree in co-relation 14479. Up to 2497 conditions per place. [2024-06-14 11:51:16,940 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 80 selfloop transitions, 36 changer transitions 0/122 dead transitions. [2024-06-14 11:51:16,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 1072 flow [2024-06-14 11:51:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:51:16,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 11:51:16,942 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 658 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:51:16,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 1072 flow [2024-06-14 11:51:16,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 966 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:16,970 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 674 flow [2024-06-14 11:51:16,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-14 11:51:16,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 11:51:16,970 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 674 flow [2024-06-14 11:51:16,971 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) [2024-06-14 11:51:16,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:16,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:16,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:51:16,971 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)] === [2024-06-14 11:51:16,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1570807715, now seen corresponding path program 3 times [2024-06-14 11:51:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:16,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896617000] [2024-06-14 11:51:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896617000] [2024-06-14 11:51:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896617000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:17,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687686562] [2024-06-14 11:51:17,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:17,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:17,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 674 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) [2024-06-14 11:51:17,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:17,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:17,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:18,386 INFO L124 PetriNetUnfolderBase]: 1896/2930 cut-off events. [2024-06-14 11:51:18,386 INFO L125 PetriNetUnfolderBase]: For 41467/41467 co-relation queries the response was YES. [2024-06-14 11:51:18,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14906 conditions, 2930 events. 1896/2930 cut-off events. For 41467/41467 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14667 event pairs, 609 based on Foata normal form. 4/2932 useless extension candidates. Maximal degree in co-relation 14869. Up to 2711 conditions per place. [2024-06-14 11:51:18,404 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 96 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-14 11:51:18,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1008 flow [2024-06-14 11:51:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:51:18,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 11:51:18,406 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 674 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:51:18,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1008 flow [2024-06-14 11:51:18,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 933 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:18,435 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 689 flow [2024-06-14 11:51:18,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=689, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-14 11:51:18,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 11:51:18,435 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 689 flow [2024-06-14 11:51:18,435 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) [2024-06-14 11:51:18,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:18,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:18,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:51:18,436 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)] === [2024-06-14 11:51:18,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash -896861121, now seen corresponding path program 4 times [2024-06-14 11:51:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:18,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58009629] [2024-06-14 11:51:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:19,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:19,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58009629] [2024-06-14 11:51:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58009629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:19,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074264623] [2024-06-14 11:51:19,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:19,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:19,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 689 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) [2024-06-14 11:51:19,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:19,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:19,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:19,859 INFO L124 PetriNetUnfolderBase]: 1886/2916 cut-off events. [2024-06-14 11:51:19,859 INFO L125 PetriNetUnfolderBase]: For 45121/45121 co-relation queries the response was YES. [2024-06-14 11:51:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14907 conditions, 2916 events. 1886/2916 cut-off events. For 45121/45121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14590 event pairs, 602 based on Foata normal form. 4/2918 useless extension candidates. Maximal degree in co-relation 14869. Up to 2670 conditions per place. [2024-06-14 11:51:19,875 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 92 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-14 11:51:19,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 120 transitions, 987 flow [2024-06-14 11:51:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:51:19,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:51:19,876 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 689 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:51:19,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 120 transitions, 987 flow [2024-06-14 11:51:19,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 120 transitions, 913 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:19,908 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 667 flow [2024-06-14 11:51:19,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-14 11:51:19,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 11:51:19,908 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 667 flow [2024-06-14 11:51:19,909 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) [2024-06-14 11:51:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:19,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:51:19,909 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)] === [2024-06-14 11:51:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 265552946, now seen corresponding path program 1 times [2024-06-14 11:51:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254686700] [2024-06-14 11:51:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:21,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254686700] [2024-06-14 11:51:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254686700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:21,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253941353] [2024-06-14 11:51:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:21,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:21,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 667 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) [2024-06-14 11:51:21,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:21,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:21,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:22,011 INFO L124 PetriNetUnfolderBase]: 2240/3400 cut-off events. [2024-06-14 11:51:22,011 INFO L125 PetriNetUnfolderBase]: For 56661/56661 co-relation queries the response was YES. [2024-06-14 11:51:22,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17295 conditions, 3400 events. 2240/3400 cut-off events. For 56661/56661 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16403 event pairs, 741 based on Foata normal form. 4/3402 useless extension candidates. Maximal degree in co-relation 17256. Up to 3208 conditions per place. [2024-06-14 11:51:22,038 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-06-14 11:51:22,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 1013 flow [2024-06-14 11:51:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:51:22,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 11:51:22,051 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 667 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:51:22,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 1013 flow [2024-06-14 11:51:22,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 916 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:22,081 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 673 flow [2024-06-14 11:51:22,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-14 11:51:22,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 11:51:22,082 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 673 flow [2024-06-14 11:51:22,083 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) [2024-06-14 11:51:22,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:22,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:22,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:51:22,083 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:22,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1631437445, now seen corresponding path program 1 times [2024-06-14 11:51:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:22,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875326519] [2024-06-14 11:51:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:22,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:22,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875326519] [2024-06-14 11:51:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875326519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:22,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375602878] [2024-06-14 11:51:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:22,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:22,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:22,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 673 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:22,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:22,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:23,224 INFO L124 PetriNetUnfolderBase]: 2292/3449 cut-off events. [2024-06-14 11:51:23,224 INFO L125 PetriNetUnfolderBase]: For 60805/60805 co-relation queries the response was YES. [2024-06-14 11:51:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 3449 events. 2292/3449 cut-off events. For 60805/60805 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16274 event pairs, 802 based on Foata normal form. 3/3450 useless extension candidates. Maximal degree in co-relation 17701. Up to 3348 conditions per place. [2024-06-14 11:51:23,305 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 91 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-14 11:51:23,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 931 flow [2024-06-14 11:51:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 11:51:23,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 11:51:23,306 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 673 flow. Second operand 6 states and 104 transitions. [2024-06-14 11:51:23,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 931 flow [2024-06-14 11:51:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 113 transitions, 876 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:23,327 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 680 flow [2024-06-14 11:51:23,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-14 11:51:23,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-14 11:51:23,327 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 680 flow [2024-06-14 11:51:23,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:23,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:23,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:23,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:51:23,328 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)] === [2024-06-14 11:51:23,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1233409958, now seen corresponding path program 1 times [2024-06-14 11:51:23,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:23,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468632615] [2024-06-14 11:51:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:24,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468632615] [2024-06-14 11:51:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468632615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:24,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:24,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:24,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883116997] [2024-06-14 11:51:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:24,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:24,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:24,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 680 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) [2024-06-14 11:51:24,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:24,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:24,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:25,058 INFO L124 PetriNetUnfolderBase]: 2124/3271 cut-off events. [2024-06-14 11:51:25,058 INFO L125 PetriNetUnfolderBase]: For 65040/65043 co-relation queries the response was YES. [2024-06-14 11:51:25,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17649 conditions, 3271 events. 2124/3271 cut-off events. For 65040/65043 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16412 event pairs, 552 based on Foata normal form. 6/3274 useless extension candidates. Maximal degree in co-relation 17607. Up to 2880 conditions per place. [2024-06-14 11:51:25,081 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-14 11:51:25,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 139 transitions, 1162 flow [2024-06-14 11:51:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:51:25,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-14 11:51:25,082 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 680 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:51:25,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 139 transitions, 1162 flow [2024-06-14 11:51:25,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 139 transitions, 1122 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:25,109 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 769 flow [2024-06-14 11:51:25,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=769, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-14 11:51:25,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 11:51:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 769 flow [2024-06-14 11:51:25,110 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) [2024-06-14 11:51:25,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:25,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:51:25,110 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)] === [2024-06-14 11:51:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1236151598, now seen corresponding path program 2 times [2024-06-14 11:51:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:25,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002973516] [2024-06-14 11:51:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:26,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:26,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002973516] [2024-06-14 11:51:26,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002973516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:26,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:26,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:26,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190341294] [2024-06-14 11:51:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:26,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:26,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:26,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 769 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) [2024-06-14 11:51:26,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:26,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:26,767 INFO L124 PetriNetUnfolderBase]: 2116/3259 cut-off events. [2024-06-14 11:51:26,768 INFO L125 PetriNetUnfolderBase]: For 70602/70605 co-relation queries the response was YES. [2024-06-14 11:51:26,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18027 conditions, 3259 events. 2116/3259 cut-off events. For 70602/70605 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16326 event pairs, 675 based on Foata normal form. 6/3262 useless extension candidates. Maximal degree in co-relation 17984. Up to 2945 conditions per place. [2024-06-14 11:51:26,793 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2024-06-14 11:51:26,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 140 transitions, 1121 flow [2024-06-14 11:51:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:51:26,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 11:51:26,796 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 769 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:51:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 140 transitions, 1121 flow [2024-06-14 11:51:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1046 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:26,830 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 757 flow [2024-06-14 11:51:26,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=757, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2024-06-14 11:51:26,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 11:51:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 757 flow [2024-06-14 11:51:26,831 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) [2024-06-14 11:51:26,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:26,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:26,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:51:26,831 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)] === [2024-06-14 11:51:26,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash 862754090, now seen corresponding path program 1 times [2024-06-14 11:51:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013318812] [2024-06-14 11:51:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:27,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013318812] [2024-06-14 11:51:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013318812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:27,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:27,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507981003] [2024-06-14 11:51:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:27,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:27,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 757 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) [2024-06-14 11:51:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:28,599 INFO L124 PetriNetUnfolderBase]: 2159/3319 cut-off events. [2024-06-14 11:51:28,599 INFO L125 PetriNetUnfolderBase]: For 77778/77781 co-relation queries the response was YES. [2024-06-14 11:51:28,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18609 conditions, 3319 events. 2159/3319 cut-off events. For 77778/77781 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16656 event pairs, 619 based on Foata normal form. 4/3315 useless extension candidates. Maximal degree in co-relation 18564. Up to 2760 conditions per place. [2024-06-14 11:51:28,621 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 95 selfloop transitions, 53 changer transitions 0/155 dead transitions. [2024-06-14 11:51:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 155 transitions, 1319 flow [2024-06-14 11:51:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:51:28,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-14 11:51:28,623 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 757 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:51:28,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 155 transitions, 1319 flow [2024-06-14 11:51:28,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 155 transitions, 1255 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:28,662 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 882 flow [2024-06-14 11:51:28,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=882, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-06-14 11:51:28,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 11:51:28,663 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 882 flow [2024-06-14 11:51:28,663 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) [2024-06-14 11:51:28,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:51:28,664 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)] === [2024-06-14 11:51:28,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 980841770, now seen corresponding path program 2 times [2024-06-14 11:51:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:28,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438612504] [2024-06-14 11:51:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:29,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:29,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438612504] [2024-06-14 11:51:29,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438612504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415137402] [2024-06-14 11:51:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:29,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:29,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:29,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:29,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 882 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) [2024-06-14 11:51:29,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:29,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:29,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:30,249 INFO L124 PetriNetUnfolderBase]: 2178/3352 cut-off events. [2024-06-14 11:51:30,250 INFO L125 PetriNetUnfolderBase]: For 85408/85411 co-relation queries the response was YES. [2024-06-14 11:51:30,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19524 conditions, 3352 events. 2178/3352 cut-off events. For 85408/85411 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16911 event pairs, 612 based on Foata normal form. 4/3350 useless extension candidates. Maximal degree in co-relation 19478. Up to 2772 conditions per place. [2024-06-14 11:51:30,273 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 95 selfloop transitions, 64 changer transitions 0/166 dead transitions. [2024-06-14 11:51:30,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 166 transitions, 1736 flow [2024-06-14 11:51:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:51:30,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-14 11:51:30,275 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 882 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:51:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 166 transitions, 1736 flow [2024-06-14 11:51:30,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1640 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:30,369 INFO L231 Difference]: Finished difference. Result has 108 places, 124 transitions, 1161 flow [2024-06-14 11:51:30,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1161, PETRI_PLACES=108, PETRI_TRANSITIONS=124} [2024-06-14 11:51:30,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 11:51:30,370 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 124 transitions, 1161 flow [2024-06-14 11:51:30,370 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) [2024-06-14 11:51:30,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:30,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:30,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:51:30,371 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)] === [2024-06-14 11:51:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 981019400, now seen corresponding path program 3 times [2024-06-14 11:51:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:30,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576867356] [2024-06-14 11:51:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:30,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576867356] [2024-06-14 11:51:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576867356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:31,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974159243] [2024-06-14 11:51:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:31,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 1161 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) [2024-06-14 11:51:31,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:32,254 INFO L124 PetriNetUnfolderBase]: 2219/3415 cut-off events. [2024-06-14 11:51:32,254 INFO L125 PetriNetUnfolderBase]: For 95742/95745 co-relation queries the response was YES. [2024-06-14 11:51:32,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21300 conditions, 3415 events. 2219/3415 cut-off events. For 95742/95745 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17295 event pairs, 567 based on Foata normal form. 4/3411 useless extension candidates. Maximal degree in co-relation 21249. Up to 2907 conditions per place. [2024-06-14 11:51:32,281 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 105 selfloop transitions, 51 changer transitions 0/163 dead transitions. [2024-06-14 11:51:32,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1704 flow [2024-06-14 11:51:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:51:32,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 11:51:32,283 INFO L175 Difference]: Start difference. First operand has 108 places, 124 transitions, 1161 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:51:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1704 flow [2024-06-14 11:51:32,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1660 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:32,337 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1276 flow [2024-06-14 11:51:32,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1276, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2024-06-14 11:51:32,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 11:51:32,339 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1276 flow [2024-06-14 11:51:32,339 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) [2024-06-14 11:51:32,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:32,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:32,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:51:32,339 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)] === [2024-06-14 11:51:32,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -959072066, now seen corresponding path program 4 times [2024-06-14 11:51:32,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:32,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687698218] [2024-06-14 11:51:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:33,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687698218] [2024-06-14 11:51:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687698218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:33,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383445450] [2024-06-14 11:51:33,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:33,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:33,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:33,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:33,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1276 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) [2024-06-14 11:51:33,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:33,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:33,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:34,091 INFO L124 PetriNetUnfolderBase]: 2234/3440 cut-off events. [2024-06-14 11:51:34,092 INFO L125 PetriNetUnfolderBase]: For 102594/102597 co-relation queries the response was YES. [2024-06-14 11:51:34,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21922 conditions, 3440 events. 2234/3440 cut-off events. For 102594/102597 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17459 event pairs, 555 based on Foata normal form. 4/3436 useless extension candidates. Maximal degree in co-relation 21869. Up to 2965 conditions per place. [2024-06-14 11:51:34,117 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 109 selfloop transitions, 47 changer transitions 0/163 dead transitions. [2024-06-14 11:51:34,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 163 transitions, 1727 flow [2024-06-14 11:51:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:51:34,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 11:51:34,118 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1276 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:51:34,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 163 transitions, 1727 flow [2024-06-14 11:51:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 163 transitions, 1637 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:34,180 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 1343 flow [2024-06-14 11:51:34,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1343, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-14 11:51:34,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 11:51:34,181 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 1343 flow [2024-06-14 11:51:34,181 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) [2024-06-14 11:51:34,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:34,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:34,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:51:34,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:34,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:34,182 INFO L85 PathProgramCache]: Analyzing trace with hash -977440721, now seen corresponding path program 1 times [2024-06-14 11:51:34,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:34,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44393467] [2024-06-14 11:51:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:34,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44393467] [2024-06-14 11:51:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44393467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:34,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166405535] [2024-06-14 11:51:34,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:34,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:34,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 1343 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:34,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:34,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:34,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:35,388 INFO L124 PetriNetUnfolderBase]: 2459/3691 cut-off events. [2024-06-14 11:51:35,388 INFO L125 PetriNetUnfolderBase]: For 110715/110715 co-relation queries the response was YES. [2024-06-14 11:51:35,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23404 conditions, 3691 events. 2459/3691 cut-off events. For 110715/110715 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17670 event pairs, 785 based on Foata normal form. 1/3690 useless extension candidates. Maximal degree in co-relation 23350. Up to 3562 conditions per place. [2024-06-14 11:51:35,415 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 123 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-14 11:51:35,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 152 transitions, 1777 flow [2024-06-14 11:51:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 11:51:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:51:35,417 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 1343 flow. Second operand 6 states and 111 transitions. [2024-06-14 11:51:35,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 152 transitions, 1777 flow [2024-06-14 11:51:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 1659 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:35,488 INFO L231 Difference]: Finished difference. Result has 117 places, 136 transitions, 1333 flow [2024-06-14 11:51:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1333, PETRI_PLACES=117, PETRI_TRANSITIONS=136} [2024-06-14 11:51:35,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 11:51:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 136 transitions, 1333 flow [2024-06-14 11:51:35,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:35,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:35,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:35,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:51:35,489 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)] === [2024-06-14 11:51:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash -357802746, now seen corresponding path program 1 times [2024-06-14 11:51:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:35,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005687441] [2024-06-14 11:51:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:36,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005687441] [2024-06-14 11:51:36,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005687441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:36,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:36,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:36,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446354908] [2024-06-14 11:51:36,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:36,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 136 transitions, 1333 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) [2024-06-14 11:51:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:36,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:36,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:37,440 INFO L124 PetriNetUnfolderBase]: 2435/3675 cut-off events. [2024-06-14 11:51:37,440 INFO L125 PetriNetUnfolderBase]: For 119193/119193 co-relation queries the response was YES. [2024-06-14 11:51:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23738 conditions, 3675 events. 2435/3675 cut-off events. For 119193/119193 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17758 event pairs, 716 based on Foata normal form. 2/3675 useless extension candidates. Maximal degree in co-relation 23683. Up to 3472 conditions per place. [2024-06-14 11:51:37,468 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 22 changer transitions 0/163 dead transitions. [2024-06-14 11:51:37,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 163 transitions, 1737 flow [2024-06-14 11:51:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 11:51:37,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 11:51:37,470 INFO L175 Difference]: Start difference. First operand has 117 places, 136 transitions, 1333 flow. Second operand 8 states and 143 transitions. [2024-06-14 11:51:37,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 163 transitions, 1737 flow [2024-06-14 11:51:37,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 163 transitions, 1689 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:37,554 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1377 flow [2024-06-14 11:51:37,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2024-06-14 11:51:37,555 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-14 11:51:37,555 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1377 flow [2024-06-14 11:51:37,555 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) [2024-06-14 11:51:37,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:37,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:51:37,556 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)] === [2024-06-14 11:51:37,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:37,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1244560388, now seen corresponding path program 5 times [2024-06-14 11:51:37,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:37,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880796149] [2024-06-14 11:51:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:37,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880796149] [2024-06-14 11:51:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880796149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:38,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:38,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:38,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15315372] [2024-06-14 11:51:38,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:38,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:38,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:38,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1377 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) [2024-06-14 11:51:38,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:38,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:38,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:39,364 INFO L124 PetriNetUnfolderBase]: 2289/3509 cut-off events. [2024-06-14 11:51:39,364 INFO L125 PetriNetUnfolderBase]: For 125600/125600 co-relation queries the response was YES. [2024-06-14 11:51:39,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23242 conditions, 3509 events. 2289/3509 cut-off events. For 125600/125600 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17712 event pairs, 616 based on Foata normal form. 6/3506 useless extension candidates. Maximal degree in co-relation 23185. Up to 3190 conditions per place. [2024-06-14 11:51:39,391 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 138 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-06-14 11:51:39,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1838 flow [2024-06-14 11:51:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:51:39,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:51:39,392 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1377 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:51:39,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1838 flow [2024-06-14 11:51:39,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 172 transitions, 1747 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:39,464 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1405 flow [2024-06-14 11:51:39,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1405, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2024-06-14 11:51:39,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 11:51:39,465 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1405 flow [2024-06-14 11:51:39,465 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) [2024-06-14 11:51:39,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:39,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:51:39,466 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:39,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash -594281720, now seen corresponding path program 6 times [2024-06-14 11:51:39,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:39,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712415923] [2024-06-14 11:51:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:40,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:40,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712415923] [2024-06-14 11:51:40,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712415923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:40,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:40,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657416959] [2024-06-14 11:51:40,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:40,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:40,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:40,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1405 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) [2024-06-14 11:51:40,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:40,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:41,252 INFO L124 PetriNetUnfolderBase]: 2279/3495 cut-off events. [2024-06-14 11:51:41,252 INFO L125 PetriNetUnfolderBase]: For 131633/131633 co-relation queries the response was YES. [2024-06-14 11:51:41,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23317 conditions, 3495 events. 2279/3495 cut-off events. For 131633/131633 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17647 event pairs, 609 based on Foata normal form. 4/3490 useless extension candidates. Maximal degree in co-relation 23260. Up to 3182 conditions per place. [2024-06-14 11:51:41,280 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 134 selfloop transitions, 30 changer transitions 0/173 dead transitions. [2024-06-14 11:51:41,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 173 transitions, 1817 flow [2024-06-14 11:51:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:51:41,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:51:41,281 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1405 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:51:41,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 173 transitions, 1817 flow [2024-06-14 11:51:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 173 transitions, 1721 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:41,375 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1377 flow [2024-06-14 11:51:41,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2024-06-14 11:51:41,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 11:51:41,375 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1377 flow [2024-06-14 11:51:41,376 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) [2024-06-14 11:51:41,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:41,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:51:41,376 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:41,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash -466359221, now seen corresponding path program 2 times [2024-06-14 11:51:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249686420] [2024-06-14 11:51:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249686420] [2024-06-14 11:51:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249686420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038293494] [2024-06-14 11:51:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:42,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:42,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:51:42,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1377 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:42,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:42,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:51:42,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:42,675 INFO L124 PetriNetUnfolderBase]: 2491/3739 cut-off events. [2024-06-14 11:51:42,676 INFO L125 PetriNetUnfolderBase]: For 138771/138771 co-relation queries the response was YES. [2024-06-14 11:51:42,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24545 conditions, 3739 events. 2491/3739 cut-off events. For 138771/138771 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17910 event pairs, 800 based on Foata normal form. 1/3738 useless extension candidates. Maximal degree in co-relation 24487. Up to 3629 conditions per place. [2024-06-14 11:51:42,703 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 127 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2024-06-14 11:51:42,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 151 transitions, 1675 flow [2024-06-14 11:51:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 11:51:42,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:51:42,705 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1377 flow. Second operand 6 states and 102 transitions. [2024-06-14 11:51:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 151 transitions, 1675 flow [2024-06-14 11:51:42,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1552 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:42,792 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1282 flow [2024-06-14 11:51:42,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1282, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2024-06-14 11:51:42,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 11:51:42,793 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1282 flow [2024-06-14 11:51:42,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:42,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:42,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:51:42,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:42,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash -971720849, now seen corresponding path program 1 times [2024-06-14 11:51:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812861940] [2024-06-14 11:51:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812861940] [2024-06-14 11:51:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812861940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798750013] [2024-06-14 11:51:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:43,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:43,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:43,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:51:43,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:43,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:43,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:51:43,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:44,188 INFO L124 PetriNetUnfolderBase]: 2619/3869 cut-off events. [2024-06-14 11:51:44,188 INFO L125 PetriNetUnfolderBase]: For 146984/146984 co-relation queries the response was YES. [2024-06-14 11:51:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25260 conditions, 3869 events. 2619/3869 cut-off events. For 146984/146984 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18070 event pairs, 805 based on Foata normal form. 1/3868 useless extension candidates. Maximal degree in co-relation 25201. Up to 3837 conditions per place. [2024-06-14 11:51:44,214 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 142 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-14 11:51:44,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 161 transitions, 1756 flow [2024-06-14 11:51:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 11:51:44,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 11:51:44,216 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1282 flow. Second operand 6 states and 103 transitions. [2024-06-14 11:51:44,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 161 transitions, 1756 flow [2024-06-14 11:51:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 161 transitions, 1724 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:44,307 INFO L231 Difference]: Finished difference. Result has 125 places, 148 transitions, 1358 flow [2024-06-14 11:51:44,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=125, PETRI_TRANSITIONS=148} [2024-06-14 11:51:44,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 11:51:44,308 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 148 transitions, 1358 flow [2024-06-14 11:51:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:44,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:44,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:44,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:51:44,309 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:44,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -449055269, now seen corresponding path program 2 times [2024-06-14 11:51:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:44,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215882450] [2024-06-14 11:51:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:44,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:44,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:44,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215882450] [2024-06-14 11:51:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215882450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:44,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:44,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:51:44,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839444808] [2024-06-14 11:51:44,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:51:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:51:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:51:44,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:51:44,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 148 transitions, 1358 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:44,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:44,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:51:44,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:45,599 INFO L124 PetriNetUnfolderBase]: 2616/3866 cut-off events. [2024-06-14 11:51:45,599 INFO L125 PetriNetUnfolderBase]: For 156048/156051 co-relation queries the response was YES. [2024-06-14 11:51:45,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25815 conditions, 3866 events. 2616/3866 cut-off events. For 156048/156051 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18058 event pairs, 808 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 25755. Up to 3834 conditions per place. [2024-06-14 11:51:45,628 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 138 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2024-06-14 11:51:45,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 1688 flow [2024-06-14 11:51:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:51:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:51:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 11:51:45,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 11:51:45,630 INFO L175 Difference]: Start difference. First operand has 125 places, 148 transitions, 1358 flow. Second operand 6 states and 99 transitions. [2024-06-14 11:51:45,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 1688 flow [2024-06-14 11:51:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 1632 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:45,731 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1340 flow [2024-06-14 11:51:45,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1340, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-14 11:51:45,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 11:51:45,732 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1340 flow [2024-06-14 11:51:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:45,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:45,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:51:45,732 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)] === [2024-06-14 11:51:45,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1246492486, now seen corresponding path program 1 times [2024-06-14 11:51:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:45,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865409224] [2024-06-14 11:51:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865409224] [2024-06-14 11:51:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865409224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:46,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521181678] [2024-06-14 11:51:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:46,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:46,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1340 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:46,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:46,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:47,592 INFO L124 PetriNetUnfolderBase]: 2447/3757 cut-off events. [2024-06-14 11:51:47,593 INFO L125 PetriNetUnfolderBase]: For 179325/179328 co-relation queries the response was YES. [2024-06-14 11:51:47,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25871 conditions, 3757 events. 2447/3757 cut-off events. For 179325/179328 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19406 event pairs, 390 based on Foata normal form. 16/3753 useless extension candidates. Maximal degree in co-relation 25809. Up to 2560 conditions per place. [2024-06-14 11:51:47,622 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 77 changer transitions 0/201 dead transitions. [2024-06-14 11:51:47,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 201 transitions, 2284 flow [2024-06-14 11:51:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 11:51:47,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-14 11:51:47,624 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1340 flow. Second operand 9 states and 194 transitions. [2024-06-14 11:51:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 201 transitions, 2284 flow [2024-06-14 11:51:47,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 201 transitions, 2236 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:47,753 INFO L231 Difference]: Finished difference. Result has 132 places, 150 transitions, 1506 flow [2024-06-14 11:51:47,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1506, PETRI_PLACES=132, PETRI_TRANSITIONS=150} [2024-06-14 11:51:47,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 11:51:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 150 transitions, 1506 flow [2024-06-14 11:51:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:47,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:47,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:51:47,754 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)] === [2024-06-14 11:51:47,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -417117988, now seen corresponding path program 2 times [2024-06-14 11:51:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268778209] [2024-06-14 11:51:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268778209] [2024-06-14 11:51:48,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268778209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:48,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:48,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221577475] [2024-06-14 11:51:48,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:48,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 1506 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:49,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:49,893 INFO L124 PetriNetUnfolderBase]: 2588/3996 cut-off events. [2024-06-14 11:51:49,893 INFO L125 PetriNetUnfolderBase]: For 204808/204811 co-relation queries the response was YES. [2024-06-14 11:51:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27784 conditions, 3996 events. 2588/3996 cut-off events. For 204808/204811 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21047 event pairs, 631 based on Foata normal form. 40/4017 useless extension candidates. Maximal degree in co-relation 27722. Up to 3104 conditions per place. [2024-06-14 11:51:49,925 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 123 selfloop transitions, 70 changer transitions 0/204 dead transitions. [2024-06-14 11:51:49,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 204 transitions, 2118 flow [2024-06-14 11:51:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:51:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:51:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:51:49,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-14 11:51:49,927 INFO L175 Difference]: Start difference. First operand has 132 places, 150 transitions, 1506 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:51:49,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 204 transitions, 2118 flow [2024-06-14 11:51:50,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2011 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:50,054 INFO L231 Difference]: Finished difference. Result has 138 places, 153 transitions, 1625 flow [2024-06-14 11:51:50,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1625, PETRI_PLACES=138, PETRI_TRANSITIONS=153} [2024-06-14 11:51:50,054 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 11:51:50,054 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 153 transitions, 1625 flow [2024-06-14 11:51:50,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:50,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:50,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:50,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:51:50,055 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)] === [2024-06-14 11:51:50,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1246405996, now seen corresponding path program 3 times [2024-06-14 11:51:50,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:50,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493404136] [2024-06-14 11:51:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:50,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493404136] [2024-06-14 11:51:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493404136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:51,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108331127] [2024-06-14 11:51:51,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:51,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:51,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 153 transitions, 1625 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:51,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:51,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:51,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:51,981 INFO L124 PetriNetUnfolderBase]: 2760/4291 cut-off events. [2024-06-14 11:51:51,981 INFO L125 PetriNetUnfolderBase]: For 205619/205622 co-relation queries the response was YES. [2024-06-14 11:51:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29786 conditions, 4291 events. 2760/4291 cut-off events. For 205619/205622 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23296 event pairs, 652 based on Foata normal form. 16/4296 useless extension candidates. Maximal degree in co-relation 29722. Up to 3316 conditions per place. [2024-06-14 11:51:52,014 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 121 selfloop transitions, 80 changer transitions 0/212 dead transitions. [2024-06-14 11:51:52,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 212 transitions, 2556 flow [2024-06-14 11:51:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:51:52,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49870801033591733 [2024-06-14 11:51:52,016 INFO L175 Difference]: Start difference. First operand has 138 places, 153 transitions, 1625 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:51:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 212 transitions, 2556 flow [2024-06-14 11:51:52,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 212 transitions, 2369 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 11:51:52,279 INFO L231 Difference]: Finished difference. Result has 139 places, 162 transitions, 1734 flow [2024-06-14 11:51:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1734, PETRI_PLACES=139, PETRI_TRANSITIONS=162} [2024-06-14 11:51:52,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 11:51:52,280 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 162 transitions, 1734 flow [2024-06-14 11:51:52,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:52,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:52,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:52,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:51:52,280 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)] === [2024-06-14 11:51:52,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -330429898, now seen corresponding path program 4 times [2024-06-14 11:51:52,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:52,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827198353] [2024-06-14 11:51:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:52,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827198353] [2024-06-14 11:51:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827198353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:53,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:53,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:53,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811146197] [2024-06-14 11:51:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:53,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:53,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:53,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:53,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 162 transitions, 1734 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:54,264 INFO L124 PetriNetUnfolderBase]: 2826/4409 cut-off events. [2024-06-14 11:51:54,264 INFO L125 PetriNetUnfolderBase]: For 217668/217671 co-relation queries the response was YES. [2024-06-14 11:51:54,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30470 conditions, 4409 events. 2826/4409 cut-off events. For 217668/217671 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24105 event pairs, 689 based on Foata normal form. 16/4409 useless extension candidates. Maximal degree in co-relation 30404. Up to 3538 conditions per place. [2024-06-14 11:51:54,297 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 143 selfloop transitions, 53 changer transitions 0/207 dead transitions. [2024-06-14 11:51:54,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 207 transitions, 2305 flow [2024-06-14 11:51:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 11:51:54,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-14 11:51:54,299 INFO L175 Difference]: Start difference. First operand has 139 places, 162 transitions, 1734 flow. Second operand 9 states and 187 transitions. [2024-06-14 11:51:54,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 207 transitions, 2305 flow [2024-06-14 11:51:54,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2177 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:54,432 INFO L231 Difference]: Finished difference. Result has 144 places, 163 transitions, 1750 flow [2024-06-14 11:51:54,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1750, PETRI_PLACES=144, PETRI_TRANSITIONS=163} [2024-06-14 11:51:54,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 11:51:54,433 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 163 transitions, 1750 flow [2024-06-14 11:51:54,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:54,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:54,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:51:54,433 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:54,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:54,434 INFO L85 PathProgramCache]: Analyzing trace with hash -236218927, now seen corresponding path program 1 times [2024-06-14 11:51:54,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:54,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543184992] [2024-06-14 11:51:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:55,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543184992] [2024-06-14 11:51:55,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543184992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:55,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:55,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:55,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794506382] [2024-06-14 11:51:55,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:55,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:55,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:55,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:55,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:55,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:51:55,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 163 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:55,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:55,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:51:55,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:55,886 INFO L124 PetriNetUnfolderBase]: 3240/4889 cut-off events. [2024-06-14 11:51:55,886 INFO L125 PetriNetUnfolderBase]: For 222790/222793 co-relation queries the response was YES. [2024-06-14 11:51:55,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33084 conditions, 4889 events. 3240/4889 cut-off events. For 222790/222793 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25104 event pairs, 985 based on Foata normal form. 4/4890 useless extension candidates. Maximal degree in co-relation 33017. Up to 4740 conditions per place. [2024-06-14 11:51:55,924 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 157 selfloop transitions, 39 changer transitions 0/199 dead transitions. [2024-06-14 11:51:55,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 199 transitions, 2492 flow [2024-06-14 11:51:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:51:55,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 11:51:55,925 INFO L175 Difference]: Start difference. First operand has 144 places, 163 transitions, 1750 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:51:55,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 199 transitions, 2492 flow [2024-06-14 11:51:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2340 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:56,133 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 1857 flow [2024-06-14 11:51:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1857, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-14 11:51:56,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 11:51:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 1857 flow [2024-06-14 11:51:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:51:56,134 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)] === [2024-06-14 11:51:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 341321262, now seen corresponding path program 5 times [2024-06-14 11:51:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995571252] [2024-06-14 11:51:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:57,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995571252] [2024-06-14 11:51:57,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995571252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:57,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:57,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592306583] [2024-06-14 11:51:57,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:57,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 1857 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:57,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:57,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:58,336 INFO L124 PetriNetUnfolderBase]: 3106/4866 cut-off events. [2024-06-14 11:51:58,336 INFO L125 PetriNetUnfolderBase]: For 265710/265713 co-relation queries the response was YES. [2024-06-14 11:51:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34764 conditions, 4866 events. 3106/4866 cut-off events. For 265710/265713 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27379 event pairs, 612 based on Foata normal form. 16/4876 useless extension candidates. Maximal degree in co-relation 34696. Up to 3662 conditions per place. [2024-06-14 11:51:58,379 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 145 selfloop transitions, 70 changer transitions 0/229 dead transitions. [2024-06-14 11:51:58,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 229 transitions, 2683 flow [2024-06-14 11:51:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:51:58,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064599483204134 [2024-06-14 11:51:58,381 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 1857 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:51:58,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 229 transitions, 2683 flow [2024-06-14 11:51:58,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 229 transitions, 2615 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 11:51:58,581 INFO L231 Difference]: Finished difference. Result has 153 places, 178 transitions, 2053 flow [2024-06-14 11:51:58,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2053, PETRI_PLACES=153, PETRI_TRANSITIONS=178} [2024-06-14 11:51:58,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 11:51:58,581 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 178 transitions, 2053 flow [2024-06-14 11:51:58,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:58,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:58,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:58,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:51:58,582 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)] === [2024-06-14 11:51:58,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:58,582 INFO L85 PathProgramCache]: Analyzing trace with hash 496138648, now seen corresponding path program 6 times [2024-06-14 11:51:58,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:58,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417546457] [2024-06-14 11:51:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:58,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:59,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417546457] [2024-06-14 11:51:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417546457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:59,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851652433] [2024-06-14 11:51:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:59,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 2053 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:59,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:59,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:59,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:00,967 INFO L124 PetriNetUnfolderBase]: 3236/5086 cut-off events. [2024-06-14 11:52:00,967 INFO L125 PetriNetUnfolderBase]: For 297367/297370 co-relation queries the response was YES. [2024-06-14 11:52:00,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36902 conditions, 5086 events. 3236/5086 cut-off events. For 297367/297370 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29097 event pairs, 795 based on Foata normal form. 36/5116 useless extension candidates. Maximal degree in co-relation 36831. Up to 4202 conditions per place. [2024-06-14 11:52:01,007 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 149 selfloop transitions, 68 changer transitions 0/231 dead transitions. [2024-06-14 11:52:01,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 231 transitions, 2715 flow [2024-06-14 11:52:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:52:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:52:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 11:52:01,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-14 11:52:01,008 INFO L175 Difference]: Start difference. First operand has 153 places, 178 transitions, 2053 flow. Second operand 10 states and 209 transitions. [2024-06-14 11:52:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 231 transitions, 2715 flow [2024-06-14 11:52:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 231 transitions, 2613 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:01,236 INFO L231 Difference]: Finished difference. Result has 158 places, 180 transitions, 2170 flow [2024-06-14 11:52:01,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2170, PETRI_PLACES=158, PETRI_TRANSITIONS=180} [2024-06-14 11:52:01,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 11:52:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 180 transitions, 2170 flow [2024-06-14 11:52:01,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:01,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:01,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:52:01,238 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)] === [2024-06-14 11:52:01,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 346831512, now seen corresponding path program 7 times [2024-06-14 11:52:01,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324143847] [2024-06-14 11:52:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:01,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:02,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324143847] [2024-06-14 11:52:02,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324143847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:02,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:02,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:02,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002973530] [2024-06-14 11:52:02,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:02,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:02,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:02,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:02,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 180 transitions, 2170 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:02,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:02,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:02,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:03,594 INFO L124 PetriNetUnfolderBase]: 3369/5309 cut-off events. [2024-06-14 11:52:03,595 INFO L125 PetriNetUnfolderBase]: For 315248/315251 co-relation queries the response was YES. [2024-06-14 11:52:03,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38744 conditions, 5309 events. 3369/5309 cut-off events. For 315248/315251 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30788 event pairs, 840 based on Foata normal form. 36/5339 useless extension candidates. Maximal degree in co-relation 38671. Up to 4565 conditions per place. [2024-06-14 11:52:03,644 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 164 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-14 11:52:03,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 226 transitions, 2806 flow [2024-06-14 11:52:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:52:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:52:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:52:03,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:52:03,646 INFO L175 Difference]: Start difference. First operand has 158 places, 180 transitions, 2170 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:52:03,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 226 transitions, 2806 flow [2024-06-14 11:52:03,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 226 transitions, 2649 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:03,911 INFO L231 Difference]: Finished difference. Result has 160 places, 182 transitions, 2194 flow [2024-06-14 11:52:03,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2194, PETRI_PLACES=160, PETRI_TRANSITIONS=182} [2024-06-14 11:52:03,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 11:52:03,912 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 182 transitions, 2194 flow [2024-06-14 11:52:03,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:03,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:03,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:03,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:52:03,912 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:03,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash -622807856, now seen corresponding path program 1 times [2024-06-14 11:52:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313384619] [2024-06-14 11:52:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:03,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313384619] [2024-06-14 11:52:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313384619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:04,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:04,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178521442] [2024-06-14 11:52:04,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:04,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:04,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 182 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:04,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:04,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:04,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:05,573 INFO L124 PetriNetUnfolderBase]: 3678/5685 cut-off events. [2024-06-14 11:52:05,573 INFO L125 PetriNetUnfolderBase]: For 306788/306788 co-relation queries the response was YES. [2024-06-14 11:52:05,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40558 conditions, 5685 events. 3678/5685 cut-off events. For 306788/306788 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31632 event pairs, 1155 based on Foata normal form. 3/5665 useless extension candidates. Maximal degree in co-relation 40484. Up to 5501 conditions per place. [2024-06-14 11:52:05,626 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 170 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-14 11:52:05,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2806 flow [2024-06-14 11:52:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:52:05,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 11:52:05,628 INFO L175 Difference]: Start difference. First operand has 160 places, 182 transitions, 2194 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:52:05,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2806 flow [2024-06-14 11:52:05,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 212 transitions, 2683 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:05,918 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 2237 flow [2024-06-14 11:52:05,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2237, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-14 11:52:05,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 11:52:05,919 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 2237 flow [2024-06-14 11:52:05,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:05,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:05,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:52:05,920 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)] === [2024-06-14 11:52:05,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -235890637, now seen corresponding path program 2 times [2024-06-14 11:52:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:05,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400333465] [2024-06-14 11:52:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:06,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400333465] [2024-06-14 11:52:06,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400333465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:06,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:06,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:06,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469393816] [2024-06-14 11:52:06,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:06,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:06,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:06,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 2237 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:06,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:06,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:06,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:07,641 INFO L124 PetriNetUnfolderBase]: 3950/6046 cut-off events. [2024-06-14 11:52:07,642 INFO L125 PetriNetUnfolderBase]: For 322959/322962 co-relation queries the response was YES. [2024-06-14 11:52:07,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43220 conditions, 6046 events. 3950/6046 cut-off events. For 322959/322962 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33280 event pairs, 2071 based on Foata normal form. 4/6047 useless extension candidates. Maximal degree in co-relation 43144. Up to 5877 conditions per place. [2024-06-14 11:52:07,694 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 195 selfloop transitions, 44 changer transitions 0/242 dead transitions. [2024-06-14 11:52:07,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 242 transitions, 3337 flow [2024-06-14 11:52:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 11:52:07,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 11:52:07,696 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 2237 flow. Second operand 8 states and 132 transitions. [2024-06-14 11:52:07,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 242 transitions, 3337 flow [2024-06-14 11:52:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 242 transitions, 3291 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:07,988 INFO L231 Difference]: Finished difference. Result has 169 places, 219 transitions, 2682 flow [2024-06-14 11:52:07,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2682, PETRI_PLACES=169, PETRI_TRANSITIONS=219} [2024-06-14 11:52:07,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 11:52:07,989 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 219 transitions, 2682 flow [2024-06-14 11:52:07,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:07,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:07,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:52:07,989 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:07,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash -20339081, now seen corresponding path program 3 times [2024-06-14 11:52:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:07,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350854240] [2024-06-14 11:52:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350854240] [2024-06-14 11:52:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350854240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865413855] [2024-06-14 11:52:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:08,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:08,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 219 transitions, 2682 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:08,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:08,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:09,770 INFO L124 PetriNetUnfolderBase]: 4031/6157 cut-off events. [2024-06-14 11:52:09,771 INFO L125 PetriNetUnfolderBase]: For 336358/336367 co-relation queries the response was YES. [2024-06-14 11:52:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44751 conditions, 6157 events. 4031/6157 cut-off events. For 336358/336367 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33867 event pairs, 1193 based on Foata normal form. 8/6162 useless extension candidates. Maximal degree in co-relation 44669. Up to 5852 conditions per place. [2024-06-14 11:52:09,826 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 189 selfloop transitions, 81 changer transitions 0/273 dead transitions. [2024-06-14 11:52:09,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 273 transitions, 3914 flow [2024-06-14 11:52:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 11:52:09,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 11:52:09,827 INFO L175 Difference]: Start difference. First operand has 169 places, 219 transitions, 2682 flow. Second operand 8 states and 143 transitions. [2024-06-14 11:52:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 273 transitions, 3914 flow [2024-06-14 11:52:10,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 273 transitions, 3828 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-14 11:52:10,154 INFO L231 Difference]: Finished difference. Result has 179 places, 246 transitions, 3263 flow [2024-06-14 11:52:10,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=179, PETRI_TRANSITIONS=246} [2024-06-14 11:52:10,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 11:52:10,154 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 246 transitions, 3263 flow [2024-06-14 11:52:10,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:10,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:10,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:52:10,155 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)] === [2024-06-14 11:52:10,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2012440811, now seen corresponding path program 1 times [2024-06-14 11:52:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:10,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029213835] [2024-06-14 11:52:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:10,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029213835] [2024-06-14 11:52:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029213835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:11,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068464864] [2024-06-14 11:52:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:11,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:11,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 246 transitions, 3263 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:11,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:11,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:11,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:12,585 INFO L124 PetriNetUnfolderBase]: 3967/6111 cut-off events. [2024-06-14 11:52:12,585 INFO L125 PetriNetUnfolderBase]: For 368053/368064 co-relation queries the response was YES. [2024-06-14 11:52:12,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46169 conditions, 6111 events. 3967/6111 cut-off events. For 368053/368064 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34191 event pairs, 1985 based on Foata normal form. 4/6075 useless extension candidates. Maximal degree in co-relation 46081. Up to 5831 conditions per place. [2024-06-14 11:52:12,646 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 25 changer transitions 0/280 dead transitions. [2024-06-14 11:52:12,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 3947 flow [2024-06-14 11:52:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 11:52:12,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 11:52:12,648 INFO L175 Difference]: Start difference. First operand has 179 places, 246 transitions, 3263 flow. Second operand 9 states and 161 transitions. [2024-06-14 11:52:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 3947 flow [2024-06-14 11:52:13,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 280 transitions, 3829 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:13,174 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3296 flow [2024-06-14 11:52:13,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3296, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-14 11:52:13,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 11:52:13,175 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3296 flow [2024-06-14 11:52:13,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:13,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:13,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:52:13,176 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -630510466, now seen corresponding path program 1 times [2024-06-14 11:52:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:13,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348555752] [2024-06-14 11:52:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348555752] [2024-06-14 11:52:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348555752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:13,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92459405] [2024-06-14 11:52:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:13,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:13,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:14,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:14,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3296 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:14,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:14,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:14,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:15,235 INFO L124 PetriNetUnfolderBase]: 4219/6421 cut-off events. [2024-06-14 11:52:15,235 INFO L125 PetriNetUnfolderBase]: For 389643/389652 co-relation queries the response was YES. [2024-06-14 11:52:15,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48605 conditions, 6421 events. 4219/6421 cut-off events. For 389643/389652 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 35475 event pairs, 1183 based on Foata normal form. 12/6430 useless extension candidates. Maximal degree in co-relation 48515. Up to 5882 conditions per place. [2024-06-14 11:52:15,302 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 225 selfloop transitions, 87 changer transitions 0/315 dead transitions. [2024-06-14 11:52:15,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 315 transitions, 4794 flow [2024-06-14 11:52:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:52:15,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:52:15,303 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3296 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:52:15,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 315 transitions, 4794 flow [2024-06-14 11:52:15,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 315 transitions, 4693 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:15,779 INFO L231 Difference]: Finished difference. Result has 193 places, 271 transitions, 3726 flow [2024-06-14 11:52:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3726, PETRI_PLACES=193, PETRI_TRANSITIONS=271} [2024-06-14 11:52:15,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 11:52:15,780 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 271 transitions, 3726 flow [2024-06-14 11:52:15,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:15,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:15,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:52:15,781 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)] === [2024-06-14 11:52:15,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash -487441869, now seen corresponding path program 2 times [2024-06-14 11:52:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375221044] [2024-06-14 11:52:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375221044] [2024-06-14 11:52:16,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375221044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:16,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:16,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:16,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450043559] [2024-06-14 11:52:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:16,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:16,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:16,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 271 transitions, 3726 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:16,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:16,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:16,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:18,109 INFO L124 PetriNetUnfolderBase]: 4144/6362 cut-off events. [2024-06-14 11:52:18,109 INFO L125 PetriNetUnfolderBase]: For 424719/424730 co-relation queries the response was YES. [2024-06-14 11:52:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50944 conditions, 6362 events. 4144/6362 cut-off events. For 424719/424730 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35874 event pairs, 2003 based on Foata normal form. 4/6326 useless extension candidates. Maximal degree in co-relation 50849. Up to 6041 conditions per place. [2024-06-14 11:52:18,177 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 34 changer transitions 0/306 dead transitions. [2024-06-14 11:52:18,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 306 transitions, 4475 flow [2024-06-14 11:52:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 11:52:18,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 11:52:18,178 INFO L175 Difference]: Start difference. First operand has 193 places, 271 transitions, 3726 flow. Second operand 9 states and 163 transitions. [2024-06-14 11:52:18,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 306 transitions, 4475 flow [2024-06-14 11:52:18,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 306 transitions, 4372 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 11:52:18,789 INFO L231 Difference]: Finished difference. Result has 201 places, 276 transitions, 3794 flow [2024-06-14 11:52:18,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3794, PETRI_PLACES=201, PETRI_TRANSITIONS=276} [2024-06-14 11:52:18,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 11:52:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 276 transitions, 3794 flow [2024-06-14 11:52:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:52:18,791 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)] === [2024-06-14 11:52:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1527105402, now seen corresponding path program 8 times [2024-06-14 11:52:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099937342] [2024-06-14 11:52:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099937342] [2024-06-14 11:52:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099937342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:19,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:19,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881474717] [2024-06-14 11:52:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:19,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:19,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 276 transitions, 3794 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:19,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:19,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:19,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:21,222 INFO L124 PetriNetUnfolderBase]: 3936/6157 cut-off events. [2024-06-14 11:52:21,223 INFO L125 PetriNetUnfolderBase]: For 465004/465015 co-relation queries the response was YES. [2024-06-14 11:52:21,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50071 conditions, 6157 events. 3936/6157 cut-off events. For 465004/465015 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 36280 event pairs, 1748 based on Foata normal form. 36/6156 useless extension candidates. Maximal degree in co-relation 49972. Up to 5552 conditions per place. [2024-06-14 11:52:21,404 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 261 selfloop transitions, 30 changer transitions 0/317 dead transitions. [2024-06-14 11:52:21,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4594 flow [2024-06-14 11:52:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:52:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:52:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 11:52:21,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 11:52:21,406 INFO L175 Difference]: Start difference. First operand has 201 places, 276 transitions, 3794 flow. Second operand 10 states and 189 transitions. [2024-06-14 11:52:21,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4594 flow [2024-06-14 11:52:21,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 317 transitions, 4473 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:21,972 INFO L231 Difference]: Finished difference. Result has 205 places, 278 transitions, 3822 flow [2024-06-14 11:52:21,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3822, PETRI_PLACES=205, PETRI_TRANSITIONS=278} [2024-06-14 11:52:21,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 11:52:21,973 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 278 transitions, 3822 flow [2024-06-14 11:52:21,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:21,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:21,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:21,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:52:21,973 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)] === [2024-06-14 11:52:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash -206014816, now seen corresponding path program 9 times [2024-06-14 11:52:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:21,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215530660] [2024-06-14 11:52:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215530660] [2024-06-14 11:52:23,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215530660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:23,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:23,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139599978] [2024-06-14 11:52:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:23,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:23,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 278 transitions, 3822 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:23,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:23,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:23,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:24,561 INFO L124 PetriNetUnfolderBase]: 3872/6057 cut-off events. [2024-06-14 11:52:24,562 INFO L125 PetriNetUnfolderBase]: For 446954/446965 co-relation queries the response was YES. [2024-06-14 11:52:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48204 conditions, 6057 events. 3872/6057 cut-off events. For 446954/446965 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35586 event pairs, 1707 based on Foata normal form. 36/6056 useless extension candidates. Maximal degree in co-relation 48104. Up to 5430 conditions per place. [2024-06-14 11:52:24,626 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 254 selfloop transitions, 39 changer transitions 0/319 dead transitions. [2024-06-14 11:52:24,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 319 transitions, 4562 flow [2024-06-14 11:52:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:52:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:52:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 11:52:24,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 11:52:24,628 INFO L175 Difference]: Start difference. First operand has 205 places, 278 transitions, 3822 flow. Second operand 10 states and 192 transitions. [2024-06-14 11:52:24,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 319 transitions, 4562 flow [2024-06-14 11:52:25,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 319 transitions, 4451 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:25,278 INFO L231 Difference]: Finished difference. Result has 207 places, 278 transitions, 3798 flow [2024-06-14 11:52:25,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3798, PETRI_PLACES=207, PETRI_TRANSITIONS=278} [2024-06-14 11:52:25,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 11:52:25,278 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 278 transitions, 3798 flow [2024-06-14 11:52:25,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:25,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:25,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:52:25,279 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)] === [2024-06-14 11:52:25,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1793344593, now seen corresponding path program 3 times [2024-06-14 11:52:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824358192] [2024-06-14 11:52:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824358192] [2024-06-14 11:52:26,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824358192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:26,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:26,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749582911] [2024-06-14 11:52:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:26,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:26,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:26,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:26,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 278 transitions, 3798 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:26,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:27,783 INFO L124 PetriNetUnfolderBase]: 4239/6527 cut-off events. [2024-06-14 11:52:27,783 INFO L125 PetriNetUnfolderBase]: For 434261/434272 co-relation queries the response was YES. [2024-06-14 11:52:27,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50991 conditions, 6527 events. 4239/6527 cut-off events. For 434261/434272 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37123 event pairs, 1984 based on Foata normal form. 4/6491 useless extension candidates. Maximal degree in co-relation 50890. Up to 6260 conditions per place. [2024-06-14 11:52:27,856 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 265 selfloop transitions, 21 changer transitions 0/308 dead transitions. [2024-06-14 11:52:27,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 308 transitions, 4514 flow [2024-06-14 11:52:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 11:52:27,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 11:52:27,858 INFO L175 Difference]: Start difference. First operand has 207 places, 278 transitions, 3798 flow. Second operand 9 states and 158 transitions. [2024-06-14 11:52:27,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 308 transitions, 4514 flow [2024-06-14 11:52:28,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 308 transitions, 4395 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 11:52:28,444 INFO L231 Difference]: Finished difference. Result has 207 places, 280 transitions, 3794 flow [2024-06-14 11:52:28,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3794, PETRI_PLACES=207, PETRI_TRANSITIONS=280} [2024-06-14 11:52:28,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 11:52:28,448 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 280 transitions, 3794 flow [2024-06-14 11:52:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:52:28,453 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)] === [2024-06-14 11:52:28,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1387982101, now seen corresponding path program 4 times [2024-06-14 11:52:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:28,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905615069] [2024-06-14 11:52:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905615069] [2024-06-14 11:52:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905615069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:29,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:29,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:29,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414710373] [2024-06-14 11:52:29,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:29,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:29,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 280 transitions, 3794 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:29,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:29,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:29,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:30,824 INFO L124 PetriNetUnfolderBase]: 4256/6554 cut-off events. [2024-06-14 11:52:30,824 INFO L125 PetriNetUnfolderBase]: For 449897/449908 co-relation queries the response was YES. [2024-06-14 11:52:30,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51310 conditions, 6554 events. 4256/6554 cut-off events. For 449897/449908 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 37367 event pairs, 2005 based on Foata normal form. 4/6518 useless extension candidates. Maximal degree in co-relation 51208. Up to 6301 conditions per place. [2024-06-14 11:52:30,896 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 268 selfloop transitions, 20 changer transitions 0/310 dead transitions. [2024-06-14 11:52:30,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 310 transitions, 4520 flow [2024-06-14 11:52:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 11:52:30,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 11:52:30,902 INFO L175 Difference]: Start difference. First operand has 207 places, 280 transitions, 3794 flow. Second operand 9 states and 158 transitions. [2024-06-14 11:52:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 310 transitions, 4520 flow [2024-06-14 11:52:31,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 310 transitions, 4423 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:31,705 INFO L231 Difference]: Finished difference. Result has 209 places, 282 transitions, 3814 flow [2024-06-14 11:52:31,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3814, PETRI_PLACES=209, PETRI_TRANSITIONS=282} [2024-06-14 11:52:31,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 11:52:31,714 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 282 transitions, 3814 flow [2024-06-14 11:52:31,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:31,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:31,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:52:31,715 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)] === [2024-06-14 11:52:31,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1793018163, now seen corresponding path program 5 times [2024-06-14 11:52:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:31,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589079625] [2024-06-14 11:52:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:31,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589079625] [2024-06-14 11:52:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589079625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522232265] [2024-06-14 11:52:32,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:32,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:32,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 282 transitions, 3814 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:32,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:32,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:32,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:34,417 INFO L124 PetriNetUnfolderBase]: 4248/6542 cut-off events. [2024-06-14 11:52:34,418 INFO L125 PetriNetUnfolderBase]: For 462450/462461 co-relation queries the response was YES. [2024-06-14 11:52:34,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51333 conditions, 6542 events. 4248/6542 cut-off events. For 462450/462461 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 37223 event pairs, 1988 based on Foata normal form. 4/6506 useless extension candidates. Maximal degree in co-relation 51230. Up to 6253 conditions per place. [2024-06-14 11:52:34,500 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 27 changer transitions 0/312 dead transitions. [2024-06-14 11:52:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 312 transitions, 4548 flow [2024-06-14 11:52:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 11:52:34,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 11:52:34,502 INFO L175 Difference]: Start difference. First operand has 209 places, 282 transitions, 3814 flow. Second operand 9 states and 159 transitions. [2024-06-14 11:52:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 312 transitions, 4548 flow [2024-06-14 11:52:35,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 312 transitions, 4451 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:35,250 INFO L231 Difference]: Finished difference. Result has 212 places, 284 transitions, 3855 flow [2024-06-14 11:52:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3855, PETRI_PLACES=212, PETRI_TRANSITIONS=284} [2024-06-14 11:52:35,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 11:52:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 284 transitions, 3855 flow [2024-06-14 11:52:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:35,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:35,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:52:35,252 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)] === [2024-06-14 11:52:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 192580030, now seen corresponding path program 1 times [2024-06-14 11:52:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142160095] [2024-06-14 11:52:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:36,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:36,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142160095] [2024-06-14 11:52:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142160095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:36,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:36,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183092128] [2024-06-14 11:52:36,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:36,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 284 transitions, 3855 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:36,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:37,824 INFO L124 PetriNetUnfolderBase]: 4265/6567 cut-off events. [2024-06-14 11:52:37,824 INFO L125 PetriNetUnfolderBase]: For 475117/475128 co-relation queries the response was YES. [2024-06-14 11:52:37,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51714 conditions, 6567 events. 4265/6567 cut-off events. For 475117/475128 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 37435 event pairs, 2001 based on Foata normal form. 2/6529 useless extension candidates. Maximal degree in co-relation 51610. Up to 6282 conditions per place. [2024-06-14 11:52:37,896 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 264 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-14 11:52:37,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 315 transitions, 4565 flow [2024-06-14 11:52:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 11:52:37,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 11:52:37,898 INFO L175 Difference]: Start difference. First operand has 212 places, 284 transitions, 3855 flow. Second operand 9 states and 160 transitions. [2024-06-14 11:52:37,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 315 transitions, 4565 flow [2024-06-14 11:52:38,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 315 transitions, 4431 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:38,601 INFO L231 Difference]: Finished difference. Result has 214 places, 287 transitions, 3835 flow [2024-06-14 11:52:38,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3835, PETRI_PLACES=214, PETRI_TRANSITIONS=287} [2024-06-14 11:52:38,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 11:52:38,602 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 287 transitions, 3835 flow [2024-06-14 11:52:38,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-14 11:52:38,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:38,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:38,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:52:38,602 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:38,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -611695286, now seen corresponding path program 2 times [2024-06-14 11:52:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:38,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571535853] [2024-06-14 11:52:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:39,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571535853] [2024-06-14 11:52:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571535853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:39,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:39,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288116392] [2024-06-14 11:52:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:39,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:39,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:39,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 287 transitions, 3835 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:39,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:39,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:39,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:40,548 INFO L124 PetriNetUnfolderBase]: 4245/6544 cut-off events. [2024-06-14 11:52:40,548 INFO L125 PetriNetUnfolderBase]: For 458917/458934 co-relation queries the response was YES. [2024-06-14 11:52:40,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50298 conditions, 6544 events. 4245/6544 cut-off events. For 458917/458934 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37388 event pairs, 2025 based on Foata normal form. 10/6520 useless extension candidates. Maximal degree in co-relation 50193. Up to 6293 conditions per place. [2024-06-14 11:52:40,619 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 249 selfloop transitions, 15 changer transitions 0/301 dead transitions. [2024-06-14 11:52:40,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 301 transitions, 4442 flow [2024-06-14 11:52:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 11:52:40,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 11:52:40,620 INFO L175 Difference]: Start difference. First operand has 214 places, 287 transitions, 3835 flow. Second operand 7 states and 117 transitions. [2024-06-14 11:52:40,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 301 transitions, 4442 flow [2024-06-14 11:52:41,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 301 transitions, 4304 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 11:52:41,276 INFO L231 Difference]: Finished difference. Result has 212 places, 290 transitions, 3787 flow [2024-06-14 11:52:41,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3787, PETRI_PLACES=212, PETRI_TRANSITIONS=290} [2024-06-14 11:52:41,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 11:52:41,277 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 290 transitions, 3787 flow [2024-06-14 11:52:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:41,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:41,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:41,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:52:41,278 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:41,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1572232918, now seen corresponding path program 3 times [2024-06-14 11:52:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:41,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878142522] [2024-06-14 11:52:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:41,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878142522] [2024-06-14 11:52:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878142522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:41,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:41,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054437202] [2024-06-14 11:52:41,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:41,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:41,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:52:42,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 290 transitions, 3787 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:42,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:52:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:43,253 INFO L124 PetriNetUnfolderBase]: 4236/6532 cut-off events. [2024-06-14 11:52:43,253 INFO L125 PetriNetUnfolderBase]: For 468647/468664 co-relation queries the response was YES. [2024-06-14 11:52:43,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50154 conditions, 6532 events. 4236/6532 cut-off events. For 468647/468664 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37326 event pairs, 2008 based on Foata normal form. 10/6508 useless extension candidates. Maximal degree in co-relation 50048. Up to 6269 conditions per place. [2024-06-14 11:52:43,323 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 20 changer transitions 0/303 dead transitions. [2024-06-14 11:52:43,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 303 transitions, 4357 flow [2024-06-14 11:52:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 11:52:43,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 11:52:43,324 INFO L175 Difference]: Start difference. First operand has 212 places, 290 transitions, 3787 flow. Second operand 7 states and 121 transitions. [2024-06-14 11:52:43,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 303 transitions, 4357 flow [2024-06-14 11:52:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 4268 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:43,954 INFO L231 Difference]: Finished difference. Result has 214 places, 290 transitions, 3744 flow [2024-06-14 11:52:43,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3744, PETRI_PLACES=214, PETRI_TRANSITIONS=290} [2024-06-14 11:52:43,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 11:52:43,955 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 290 transitions, 3744 flow [2024-06-14 11:52:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:43,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:43,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:43,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:52:43,956 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)] === [2024-06-14 11:52:43,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1572233321, now seen corresponding path program 4 times [2024-06-14 11:52:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:43,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731201752] [2024-06-14 11:52:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:43,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:44,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731201752] [2024-06-14 11:52:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731201752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740986833] [2024-06-14 11:52:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:44,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:44,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 290 transitions, 3744 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:44,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:44,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:44,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:46,008 INFO L124 PetriNetUnfolderBase]: 4359/6666 cut-off events. [2024-06-14 11:52:46,008 INFO L125 PetriNetUnfolderBase]: For 474337/474340 co-relation queries the response was YES. [2024-06-14 11:52:46,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51218 conditions, 6666 events. 4359/6666 cut-off events. For 474337/474340 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37399 event pairs, 2082 based on Foata normal form. 4/6667 useless extension candidates. Maximal degree in co-relation 51112. Up to 6590 conditions per place. [2024-06-14 11:52:46,082 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 26 changer transitions 0/300 dead transitions. [2024-06-14 11:52:46,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 300 transitions, 4472 flow [2024-06-14 11:52:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 11:52:46,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 11:52:46,084 INFO L175 Difference]: Start difference. First operand has 214 places, 290 transitions, 3744 flow. Second operand 7 states and 115 transitions. [2024-06-14 11:52:46,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 300 transitions, 4472 flow [2024-06-14 11:52:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 300 transitions, 4379 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:46,713 INFO L231 Difference]: Finished difference. Result has 215 places, 290 transitions, 3711 flow [2024-06-14 11:52:46,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3651, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3711, PETRI_PLACES=215, PETRI_TRANSITIONS=290} [2024-06-14 11:52:46,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 11:52:46,714 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 290 transitions, 3711 flow [2024-06-14 11:52:46,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:46,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:46,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:52:46,715 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:46,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2080122379, now seen corresponding path program 1 times [2024-06-14 11:52:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485428831] [2024-06-14 11:52:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485428831] [2024-06-14 11:52:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485428831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765722558] [2024-06-14 11:52:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:47,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:47,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:47,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:47,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 290 transitions, 3711 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:47,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:47,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:47,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:48,862 INFO L124 PetriNetUnfolderBase]: 4364/6672 cut-off events. [2024-06-14 11:52:48,862 INFO L125 PetriNetUnfolderBase]: For 488351/488351 co-relation queries the response was YES. [2024-06-14 11:52:48,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51481 conditions, 6672 events. 4364/6672 cut-off events. For 488351/488351 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37406 event pairs, 2078 based on Foata normal form. 1/6671 useless extension candidates. Maximal degree in co-relation 51374. Up to 6601 conditions per place. [2024-06-14 11:52:48,940 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 284 selfloop transitions, 25 changer transitions 0/312 dead transitions. [2024-06-14 11:52:48,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 312 transitions, 4553 flow [2024-06-14 11:52:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 11:52:48,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:52:48,943 INFO L175 Difference]: Start difference. First operand has 215 places, 290 transitions, 3711 flow. Second operand 7 states and 119 transitions. [2024-06-14 11:52:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 312 transitions, 4553 flow [2024-06-14 11:52:49,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 312 transitions, 4449 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:52:49,713 INFO L231 Difference]: Finished difference. Result has 217 places, 296 transitions, 3737 flow [2024-06-14 11:52:49,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3737, PETRI_PLACES=217, PETRI_TRANSITIONS=296} [2024-06-14 11:52:49,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 11:52:49,713 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 296 transitions, 3737 flow [2024-06-14 11:52:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:49,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:49,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:52:49,714 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)] === [2024-06-14 11:52:49,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash -58574419, now seen corresponding path program 2 times [2024-06-14 11:52:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591694480] [2024-06-14 11:52:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:50,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:50,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591694480] [2024-06-14 11:52:50,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591694480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:50,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:50,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:50,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673379516] [2024-06-14 11:52:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:50,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:50,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 296 transitions, 3737 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:50,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:50,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:51,752 INFO L124 PetriNetUnfolderBase]: 4369/6679 cut-off events. [2024-06-14 11:52:51,752 INFO L125 PetriNetUnfolderBase]: For 505658/505658 co-relation queries the response was YES. [2024-06-14 11:52:51,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52192 conditions, 6679 events. 4369/6679 cut-off events. For 505658/505658 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37464 event pairs, 2078 based on Foata normal form. 1/6678 useless extension candidates. Maximal degree in co-relation 52084. Up to 6607 conditions per place. [2024-06-14 11:52:51,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 27 changer transitions 0/312 dead transitions. [2024-06-14 11:52:51,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 312 transitions, 4543 flow [2024-06-14 11:52:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 11:52:51,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 11:52:51,829 INFO L175 Difference]: Start difference. First operand has 217 places, 296 transitions, 3737 flow. Second operand 7 states and 117 transitions. [2024-06-14 11:52:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 312 transitions, 4543 flow [2024-06-14 11:52:52,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 312 transitions, 4466 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:52,637 INFO L231 Difference]: Finished difference. Result has 221 places, 299 transitions, 3760 flow [2024-06-14 11:52:52,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3760, PETRI_PLACES=221, PETRI_TRANSITIONS=299} [2024-06-14 11:52:52,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-14 11:52:52,638 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 299 transitions, 3760 flow [2024-06-14 11:52:52,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:52,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:52:52,639 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:52,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -58574202, now seen corresponding path program 1 times [2024-06-14 11:52:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669004720] [2024-06-14 11:52:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:53,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:53,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669004720] [2024-06-14 11:52:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669004720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:53,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:53,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:53,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379633741] [2024-06-14 11:52:53,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:53,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:53,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:53,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:53,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 299 transitions, 3760 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:53,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:53,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:53,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:54,691 INFO L124 PetriNetUnfolderBase]: 4384/6700 cut-off events. [2024-06-14 11:52:54,692 INFO L125 PetriNetUnfolderBase]: For 524288/524288 co-relation queries the response was YES. [2024-06-14 11:52:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52363 conditions, 6700 events. 4384/6700 cut-off events. For 524288/524288 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37534 event pairs, 2077 based on Foata normal form. 3/6701 useless extension candidates. Maximal degree in co-relation 52253. Up to 6609 conditions per place. [2024-06-14 11:52:54,785 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 291 selfloop transitions, 30 changer transitions 0/324 dead transitions. [2024-06-14 11:52:54,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 4690 flow [2024-06-14 11:52:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 11:52:54,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 11:52:54,786 INFO L175 Difference]: Start difference. First operand has 221 places, 299 transitions, 3760 flow. Second operand 7 states and 123 transitions. [2024-06-14 11:52:54,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 4690 flow [2024-06-14 11:52:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 324 transitions, 4638 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:55,603 INFO L231 Difference]: Finished difference. Result has 224 places, 307 transitions, 3907 flow [2024-06-14 11:52:55,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3708, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3907, PETRI_PLACES=224, PETRI_TRANSITIONS=307} [2024-06-14 11:52:55,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-14 11:52:55,605 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 307 transitions, 3907 flow [2024-06-14 11:52:55,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:55,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:55,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:52:55,605 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:55,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1045641436, now seen corresponding path program 2 times [2024-06-14 11:52:55,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:55,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251933019] [2024-06-14 11:52:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251933019] [2024-06-14 11:52:56,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251933019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:56,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:56,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502973114] [2024-06-14 11:52:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:56,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:56,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 307 transitions, 3907 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:56,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:56,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:56,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:57,819 INFO L124 PetriNetUnfolderBase]: 4399/6722 cut-off events. [2024-06-14 11:52:57,819 INFO L125 PetriNetUnfolderBase]: For 542632/542635 co-relation queries the response was YES. [2024-06-14 11:52:57,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53144 conditions, 6722 events. 4399/6722 cut-off events. For 542632/542635 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37664 event pairs, 2075 based on Foata normal form. 5/6724 useless extension candidates. Maximal degree in co-relation 53033. Up to 6623 conditions per place. [2024-06-14 11:52:57,891 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 289 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-14 11:52:57,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 4808 flow [2024-06-14 11:52:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 11:52:57,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 11:52:57,892 INFO L175 Difference]: Start difference. First operand has 224 places, 307 transitions, 3907 flow. Second operand 7 states and 120 transitions. [2024-06-14 11:52:57,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 4808 flow [2024-06-14 11:52:58,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4729 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:58,680 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 3997 flow [2024-06-14 11:52:58,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3997, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-14 11:52:58,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 11:52:58,683 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 3997 flow [2024-06-14 11:52:58,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:58,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:58,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:52:58,683 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:58,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 148079021, now seen corresponding path program 3 times [2024-06-14 11:52:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354208757] [2024-06-14 11:52:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354208757] [2024-06-14 11:52:59,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354208757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:59,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:59,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396154916] [2024-06-14 11:52:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:59,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:59,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:52:59,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 3997 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:59,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:59,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:52:59,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:00,995 INFO L124 PetriNetUnfolderBase]: 4396/6718 cut-off events. [2024-06-14 11:53:00,995 INFO L125 PetriNetUnfolderBase]: For 553968/553971 co-relation queries the response was YES. [2024-06-14 11:53:01,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53371 conditions, 6718 events. 4396/6718 cut-off events. For 553968/553971 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37649 event pairs, 2085 based on Foata normal form. 1/6716 useless extension candidates. Maximal degree in co-relation 53258. Up to 6646 conditions per place. [2024-06-14 11:53:01,062 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 291 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-14 11:53:01,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 321 transitions, 4657 flow [2024-06-14 11:53:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 11:53:01,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 11:53:01,063 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 3997 flow. Second operand 7 states and 113 transitions. [2024-06-14 11:53:01,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 321 transitions, 4657 flow [2024-06-14 11:53:01,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 321 transitions, 4511 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:01,771 INFO L231 Difference]: Finished difference. Result has 230 places, 312 transitions, 3911 flow [2024-06-14 11:53:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3911, PETRI_PLACES=230, PETRI_TRANSITIONS=312} [2024-06-14 11:53:01,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 11:53:01,773 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 312 transitions, 3911 flow [2024-06-14 11:53:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:53:01,773 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)] === [2024-06-14 11:53:01,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash 148346148, now seen corresponding path program 3 times [2024-06-14 11:53:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:01,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094462822] [2024-06-14 11:53:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094462822] [2024-06-14 11:53:02,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094462822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:02,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:02,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886747305] [2024-06-14 11:53:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:02,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:02,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 312 transitions, 3911 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:02,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:02,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:02,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:03,917 INFO L124 PetriNetUnfolderBase]: 4387/6706 cut-off events. [2024-06-14 11:53:03,917 INFO L125 PetriNetUnfolderBase]: For 567604/567607 co-relation queries the response was YES. [2024-06-14 11:53:03,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53249 conditions, 6706 events. 4387/6706 cut-off events. For 567604/567607 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 37601 event pairs, 2090 based on Foata normal form. 5/6708 useless extension candidates. Maximal degree in co-relation 53135. Up to 6612 conditions per place. [2024-06-14 11:53:04,007 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 285 selfloop transitions, 36 changer transitions 0/324 dead transitions. [2024-06-14 11:53:04,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 324 transitions, 4588 flow [2024-06-14 11:53:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 11:53:04,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 11:53:04,009 INFO L175 Difference]: Start difference. First operand has 230 places, 312 transitions, 3911 flow. Second operand 7 states and 116 transitions. [2024-06-14 11:53:04,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 324 transitions, 4588 flow [2024-06-14 11:53:04,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 324 transitions, 4472 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 11:53:04,823 INFO L231 Difference]: Finished difference. Result has 229 places, 312 transitions, 3876 flow [2024-06-14 11:53:04,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3795, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3876, PETRI_PLACES=229, PETRI_TRANSITIONS=312} [2024-06-14 11:53:04,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 11:53:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 312 transitions, 3876 flow [2024-06-14 11:53:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:04,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:04,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:04,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:53:04,825 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)] === [2024-06-14 11:53:04,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -444358728, now seen corresponding path program 1 times [2024-06-14 11:53:04,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:04,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850298168] [2024-06-14 11:53:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:05,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:05,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850298168] [2024-06-14 11:53:05,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850298168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:05,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:05,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994578081] [2024-06-14 11:53:05,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:05,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:05,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 312 transitions, 3876 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:05,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:05,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:05,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:07,145 INFO L124 PetriNetUnfolderBase]: 4477/6830 cut-off events. [2024-06-14 11:53:07,145 INFO L125 PetriNetUnfolderBase]: For 584981/584990 co-relation queries the response was YES. [2024-06-14 11:53:07,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54557 conditions, 6830 events. 4477/6830 cut-off events. For 584981/584990 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 38246 event pairs, 1185 based on Foata normal form. 10/6837 useless extension candidates. Maximal degree in co-relation 54443. Up to 6318 conditions per place. [2024-06-14 11:53:07,226 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 267 selfloop transitions, 100 changer transitions 0/370 dead transitions. [2024-06-14 11:53:07,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 370 transitions, 5368 flow [2024-06-14 11:53:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:53:07,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:53:07,227 INFO L175 Difference]: Start difference. First operand has 229 places, 312 transitions, 3876 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:53:07,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 370 transitions, 5368 flow [2024-06-14 11:53:08,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 370 transitions, 5278 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:08,103 INFO L231 Difference]: Finished difference. Result has 233 places, 341 transitions, 4462 flow [2024-06-14 11:53:08,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4462, PETRI_PLACES=233, PETRI_TRANSITIONS=341} [2024-06-14 11:53:08,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 11:53:08,104 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 341 transitions, 4462 flow [2024-06-14 11:53:08,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:08,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:08,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:53:08,105 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)] === [2024-06-14 11:53:08,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1146549238, now seen corresponding path program 2 times [2024-06-14 11:53:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:08,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641937375] [2024-06-14 11:53:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:08,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:08,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641937375] [2024-06-14 11:53:08,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641937375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:08,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:08,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217771795] [2024-06-14 11:53:08,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:08,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:08,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:09,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:09,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 341 transitions, 4462 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:09,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:09,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:09,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:10,443 INFO L124 PetriNetUnfolderBase]: 4562/6958 cut-off events. [2024-06-14 11:53:10,444 INFO L125 PetriNetUnfolderBase]: For 612307/612320 co-relation queries the response was YES. [2024-06-14 11:53:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57334 conditions, 6958 events. 4562/6958 cut-off events. For 612307/612320 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 39131 event pairs, 1471 based on Foata normal form. 12/6967 useless extension candidates. Maximal degree in co-relation 57217. Up to 6526 conditions per place. [2024-06-14 11:53:10,524 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 287 selfloop transitions, 117 changer transitions 0/407 dead transitions. [2024-06-14 11:53:10,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 407 transitions, 6291 flow [2024-06-14 11:53:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:53:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:53:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 11:53:10,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:53:10,526 INFO L175 Difference]: Start difference. First operand has 233 places, 341 transitions, 4462 flow. Second operand 10 states and 180 transitions. [2024-06-14 11:53:10,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 407 transitions, 6291 flow [2024-06-14 11:53:11,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 407 transitions, 6118 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-14 11:53:11,543 INFO L231 Difference]: Finished difference. Result has 245 places, 374 transitions, 5210 flow [2024-06-14 11:53:11,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5210, PETRI_PLACES=245, PETRI_TRANSITIONS=374} [2024-06-14 11:53:11,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 11:53:11,544 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 374 transitions, 5210 flow [2024-06-14 11:53:11,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:11,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:11,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:11,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:53:11,545 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1943191928, now seen corresponding path program 2 times [2024-06-14 11:53:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273448783] [2024-06-14 11:53:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:11,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:12,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273448783] [2024-06-14 11:53:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273448783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241303049] [2024-06-14 11:53:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:12,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:12,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 374 transitions, 5210 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:12,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:12,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:13,920 INFO L124 PetriNetUnfolderBase]: 4624/7046 cut-off events. [2024-06-14 11:53:13,920 INFO L125 PetriNetUnfolderBase]: For 648555/648562 co-relation queries the response was YES. [2024-06-14 11:53:13,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59062 conditions, 7046 events. 4624/7046 cut-off events. For 648555/648562 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39722 event pairs, 1454 based on Foata normal form. 12/7055 useless extension candidates. Maximal degree in co-relation 58939. Up to 6509 conditions per place. [2024-06-14 11:53:14,003 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 300 selfloop transitions, 133 changer transitions 0/436 dead transitions. [2024-06-14 11:53:14,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 436 transitions, 6803 flow [2024-06-14 11:53:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:53:14,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:53:14,005 INFO L175 Difference]: Start difference. First operand has 245 places, 374 transitions, 5210 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:53:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 436 transitions, 6803 flow [2024-06-14 11:53:15,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 436 transitions, 6689 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 11:53:15,067 INFO L231 Difference]: Finished difference. Result has 253 places, 405 transitions, 5916 flow [2024-06-14 11:53:15,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5916, PETRI_PLACES=253, PETRI_TRANSITIONS=405} [2024-06-14 11:53:15,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 11:53:15,068 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 405 transitions, 5916 flow [2024-06-14 11:53:15,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:15,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:15,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:53:15,069 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:15,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1826170314, now seen corresponding path program 1 times [2024-06-14 11:53:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:15,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285917274] [2024-06-14 11:53:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285917274] [2024-06-14 11:53:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285917274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:15,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:15,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898072253] [2024-06-14 11:53:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:15,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:15,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:15,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:15,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 405 transitions, 5916 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:15,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:15,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:15,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:17,328 INFO L124 PetriNetUnfolderBase]: 4674/7117 cut-off events. [2024-06-14 11:53:17,328 INFO L125 PetriNetUnfolderBase]: For 673026/673039 co-relation queries the response was YES. [2024-06-14 11:53:17,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61963 conditions, 7117 events. 4674/7117 cut-off events. For 673026/673039 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 40045 event pairs, 1476 based on Foata normal form. 14/7128 useless extension candidates. Maximal degree in co-relation 61836. Up to 6730 conditions per place. [2024-06-14 11:53:17,424 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 333 selfloop transitions, 111 changer transitions 0/447 dead transitions. [2024-06-14 11:53:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 447 transitions, 7678 flow [2024-06-14 11:53:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:53:17,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:53:17,426 INFO L175 Difference]: Start difference. First operand has 253 places, 405 transitions, 5916 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:53:17,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 447 transitions, 7678 flow [2024-06-14 11:53:18,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 447 transitions, 7599 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 11:53:18,947 INFO L231 Difference]: Finished difference. Result has 261 places, 423 transitions, 6578 flow [2024-06-14 11:53:18,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5837, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6578, PETRI_PLACES=261, PETRI_TRANSITIONS=423} [2024-06-14 11:53:18,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 11:53:18,948 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 423 transitions, 6578 flow [2024-06-14 11:53:18,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:18,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:18,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:18,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:53:18,949 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)] === [2024-06-14 11:53:18,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash 97540239, now seen corresponding path program 1 times [2024-06-14 11:53:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521118918] [2024-06-14 11:53:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521118918] [2024-06-14 11:53:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521118918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:19,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:53:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493815746] [2024-06-14 11:53:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:19,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:53:19,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:53:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:53:20,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:53:20,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 423 transitions, 6578 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:20,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:20,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:53:20,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:21,942 INFO L124 PetriNetUnfolderBase]: 4972/7604 cut-off events. [2024-06-14 11:53:21,942 INFO L125 PetriNetUnfolderBase]: For 716453/716473 co-relation queries the response was YES. [2024-06-14 11:53:22,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66407 conditions, 7604 events. 4972/7604 cut-off events. For 716453/716473 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43824 event pairs, 1266 based on Foata normal form. 12/7581 useless extension candidates. Maximal degree in co-relation 66276. Up to 6503 conditions per place. [2024-06-14 11:53:22,046 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 371 selfloop transitions, 122 changer transitions 0/530 dead transitions. [2024-06-14 11:53:22,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 530 transitions, 8381 flow [2024-06-14 11:53:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:53:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:53:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 244 transitions. [2024-06-14 11:53:22,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364937388193202 [2024-06-14 11:53:22,060 INFO L175 Difference]: Start difference. First operand has 261 places, 423 transitions, 6578 flow. Second operand 13 states and 244 transitions. [2024-06-14 11:53:22,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 530 transitions, 8381 flow [2024-06-14 11:53:23,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 530 transitions, 8198 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:23,292 INFO L231 Difference]: Finished difference. Result has 275 places, 470 transitions, 7293 flow [2024-06-14 11:53:23,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7293, PETRI_PLACES=275, PETRI_TRANSITIONS=470} [2024-06-14 11:53:23,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 11:53:23,292 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 470 transitions, 7293 flow [2024-06-14 11:53:23,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:23,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:23,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:53:23,293 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:23,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -406273913, now seen corresponding path program 1 times [2024-06-14 11:53:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:23,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563706816] [2024-06-14 11:53:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563706816] [2024-06-14 11:53:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563706816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:24,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:24,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077898995] [2024-06-14 11:53:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:24,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:24,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 470 transitions, 7293 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:24,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:24,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:24,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:26,255 INFO L124 PetriNetUnfolderBase]: 5111/7762 cut-off events. [2024-06-14 11:53:26,255 INFO L125 PetriNetUnfolderBase]: For 734781/734788 co-relation queries the response was YES. [2024-06-14 11:53:26,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69068 conditions, 7762 events. 5111/7762 cut-off events. For 734781/734788 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 44185 event pairs, 1425 based on Foata normal form. 12/7771 useless extension candidates. Maximal degree in co-relation 68931. Up to 7109 conditions per place. [2024-06-14 11:53:26,367 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 359 selfloop transitions, 164 changer transitions 0/526 dead transitions. [2024-06-14 11:53:26,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 526 transitions, 9043 flow [2024-06-14 11:53:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:53:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:53:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 11:53:26,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:53:26,369 INFO L175 Difference]: Start difference. First operand has 275 places, 470 transitions, 7293 flow. Second operand 10 states and 185 transitions. [2024-06-14 11:53:26,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 526 transitions, 9043 flow [2024-06-14 11:53:27,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 526 transitions, 8889 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 11:53:27,609 INFO L231 Difference]: Finished difference. Result has 285 places, 491 transitions, 7980 flow [2024-06-14 11:53:27,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7139, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7980, PETRI_PLACES=285, PETRI_TRANSITIONS=491} [2024-06-14 11:53:27,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 11:53:27,610 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 491 transitions, 7980 flow [2024-06-14 11:53:27,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:27,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:27,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:27,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:53:27,611 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:27,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash -630506870, now seen corresponding path program 2 times [2024-06-14 11:53:27,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:27,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074508595] [2024-06-14 11:53:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:27,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:28,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:28,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074508595] [2024-06-14 11:53:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074508595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:28,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:28,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239864846] [2024-06-14 11:53:28,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:28,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:28,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:28,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 491 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:28,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:28,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:30,048 INFO L124 PetriNetUnfolderBase]: 5097/7746 cut-off events. [2024-06-14 11:53:30,049 INFO L125 PetriNetUnfolderBase]: For 745254/745267 co-relation queries the response was YES. [2024-06-14 11:53:30,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71124 conditions, 7746 events. 5097/7746 cut-off events. For 745254/745267 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 44034 event pairs, 1449 based on Foata normal form. 14/7757 useless extension candidates. Maximal degree in co-relation 70983. Up to 7353 conditions per place. [2024-06-14 11:53:30,160 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 395 selfloop transitions, 113 changer transitions 0/511 dead transitions. [2024-06-14 11:53:30,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 511 transitions, 9328 flow [2024-06-14 11:53:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 11:53:30,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 11:53:30,162 INFO L175 Difference]: Start difference. First operand has 285 places, 491 transitions, 7980 flow. Second operand 8 states and 143 transitions. [2024-06-14 11:53:30,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 511 transitions, 9328 flow [2024-06-14 11:53:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 511 transitions, 9165 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:31,896 INFO L231 Difference]: Finished difference. Result has 289 places, 491 transitions, 8059 flow [2024-06-14 11:53:31,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7817, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8059, PETRI_PLACES=289, PETRI_TRANSITIONS=491} [2024-06-14 11:53:31,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 11:53:31,897 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 491 transitions, 8059 flow [2024-06-14 11:53:31,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:31,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:31,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:53:31,897 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:31,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1818926202, now seen corresponding path program 3 times [2024-06-14 11:53:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:31,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481540132] [2024-06-14 11:53:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:31,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:32,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481540132] [2024-06-14 11:53:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481540132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516078030] [2024-06-14 11:53:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:32,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:32,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 491 transitions, 8059 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:32,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:32,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:32,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:34,639 INFO L124 PetriNetUnfolderBase]: 5125/7783 cut-off events. [2024-06-14 11:53:34,639 INFO L125 PetriNetUnfolderBase]: For 760261/760268 co-relation queries the response was YES. [2024-06-14 11:53:34,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71440 conditions, 7783 events. 5125/7783 cut-off events. For 760261/760268 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 44318 event pairs, 1457 based on Foata normal form. 12/7792 useless extension candidates. Maximal degree in co-relation 71296. Up to 7087 conditions per place. [2024-06-14 11:53:34,752 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 385 selfloop transitions, 147 changer transitions 0/535 dead transitions. [2024-06-14 11:53:34,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 535 transitions, 9834 flow [2024-06-14 11:53:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:53:34,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:53:34,753 INFO L175 Difference]: Start difference. First operand has 289 places, 491 transitions, 8059 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:53:34,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 535 transitions, 9834 flow [2024-06-14 11:53:36,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 535 transitions, 9678 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:36,314 INFO L231 Difference]: Finished difference. Result has 293 places, 500 transitions, 8356 flow [2024-06-14 11:53:36,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7903, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8356, PETRI_PLACES=293, PETRI_TRANSITIONS=500} [2024-06-14 11:53:36,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 11:53:36,315 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 500 transitions, 8356 flow [2024-06-14 11:53:36,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:36,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:36,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:53:36,316 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)] === [2024-06-14 11:53:36,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash -630510838, now seen corresponding path program 3 times [2024-06-14 11:53:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:36,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609480218] [2024-06-14 11:53:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609480218] [2024-06-14 11:53:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609480218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:37,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:37,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:37,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085691323] [2024-06-14 11:53:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:37,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:37,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:37,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 500 transitions, 8356 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:37,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:37,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:37,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:39,146 INFO L124 PetriNetUnfolderBase]: 5121/7781 cut-off events. [2024-06-14 11:53:39,147 INFO L125 PetriNetUnfolderBase]: For 769029/769042 co-relation queries the response was YES. [2024-06-14 11:53:39,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71935 conditions, 7781 events. 5121/7781 cut-off events. For 769029/769042 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44279 event pairs, 1447 based on Foata normal form. 12/7790 useless extension candidates. Maximal degree in co-relation 71790. Up to 7377 conditions per place. [2024-06-14 11:53:39,251 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 400 selfloop transitions, 118 changer transitions 0/521 dead transitions. [2024-06-14 11:53:39,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 521 transitions, 9734 flow [2024-06-14 11:53:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 11:53:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 11:53:39,252 INFO L175 Difference]: Start difference. First operand has 293 places, 500 transitions, 8356 flow. Second operand 9 states and 156 transitions. [2024-06-14 11:53:39,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 521 transitions, 9734 flow [2024-06-14 11:53:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 521 transitions, 9425 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:40,692 INFO L231 Difference]: Finished difference. Result has 296 places, 500 transitions, 8291 flow [2024-06-14 11:53:40,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8047, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8291, PETRI_PLACES=296, PETRI_TRANSITIONS=500} [2024-06-14 11:53:40,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 11:53:40,693 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 500 transitions, 8291 flow [2024-06-14 11:53:40,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:40,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:40,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:53:40,694 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:40,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1146180586, now seen corresponding path program 4 times [2024-06-14 11:53:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648303884] [2024-06-14 11:53:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648303884] [2024-06-14 11:53:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648303884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720736534] [2024-06-14 11:53:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:41,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:41,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:41,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 500 transitions, 8291 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:41,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:41,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:41,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:43,527 INFO L124 PetriNetUnfolderBase]: 5109/7766 cut-off events. [2024-06-14 11:53:43,528 INFO L125 PetriNetUnfolderBase]: For 783113/783126 co-relation queries the response was YES. [2024-06-14 11:53:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71434 conditions, 7766 events. 5109/7766 cut-off events. For 783113/783126 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 44232 event pairs, 1436 based on Foata normal form. 16/7779 useless extension candidates. Maximal degree in co-relation 71288. Up to 7078 conditions per place. [2024-06-14 11:53:43,633 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 383 selfloop transitions, 144 changer transitions 0/530 dead transitions. [2024-06-14 11:53:43,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 530 transitions, 9897 flow [2024-06-14 11:53:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 11:53:43,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 11:53:43,635 INFO L175 Difference]: Start difference. First operand has 296 places, 500 transitions, 8291 flow. Second operand 9 states and 164 transitions. [2024-06-14 11:53:43,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 530 transitions, 9897 flow [2024-06-14 11:53:45,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 530 transitions, 9613 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:45,216 INFO L231 Difference]: Finished difference. Result has 298 places, 500 transitions, 8308 flow [2024-06-14 11:53:45,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8007, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8308, PETRI_PLACES=298, PETRI_TRANSITIONS=500} [2024-06-14 11:53:45,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 11:53:45,216 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 500 transitions, 8308 flow [2024-06-14 11:53:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:45,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:45,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:53:45,217 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:45,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1266849998, now seen corresponding path program 4 times [2024-06-14 11:53:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:45,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019596483] [2024-06-14 11:53:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:46,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:46,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019596483] [2024-06-14 11:53:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019596483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:46,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:46,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691578370] [2024-06-14 11:53:46,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:46,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:46,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:46,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 500 transitions, 8308 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:46,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:46,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:46,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:48,107 INFO L124 PetriNetUnfolderBase]: 5119/7777 cut-off events. [2024-06-14 11:53:48,108 INFO L125 PetriNetUnfolderBase]: For 794608/794615 co-relation queries the response was YES. [2024-06-14 11:53:48,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71959 conditions, 7777 events. 5119/7777 cut-off events. For 794608/794615 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44269 event pairs, 1284 based on Foata normal form. 8/7782 useless extension candidates. Maximal degree in co-relation 71812. Up to 7159 conditions per place. [2024-06-14 11:53:48,211 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 144 changer transitions 0/525 dead transitions. [2024-06-14 11:53:48,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 525 transitions, 9782 flow [2024-06-14 11:53:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:53:48,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 11:53:48,212 INFO L175 Difference]: Start difference. First operand has 298 places, 500 transitions, 8308 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:53:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 525 transitions, 9782 flow [2024-06-14 11:53:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 525 transitions, 9496 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:49,890 INFO L231 Difference]: Finished difference. Result has 298 places, 504 transitions, 8427 flow [2024-06-14 11:53:49,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8427, PETRI_PLACES=298, PETRI_TRANSITIONS=504} [2024-06-14 11:53:49,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 11:53:49,891 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 504 transitions, 8427 flow [2024-06-14 11:53:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:49,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:49,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:53:49,892 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:49,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1276979930, now seen corresponding path program 5 times [2024-06-14 11:53:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933608564] [2024-06-14 11:53:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:49,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:50,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933608564] [2024-06-14 11:53:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933608564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:50,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:50,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977093346] [2024-06-14 11:53:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:50,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:50,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:50,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 504 transitions, 8427 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:50,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:50,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:50,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:52,617 INFO L124 PetriNetUnfolderBase]: 5189/7874 cut-off events. [2024-06-14 11:53:52,618 INFO L125 PetriNetUnfolderBase]: For 841121/841128 co-relation queries the response was YES. [2024-06-14 11:53:52,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73500 conditions, 7874 events. 5189/7874 cut-off events. For 841121/841128 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44867 event pairs, 1441 based on Foata normal form. 12/7883 useless extension candidates. Maximal degree in co-relation 73352. Up to 7075 conditions per place. [2024-06-14 11:53:52,713 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 357 selfloop transitions, 187 changer transitions 0/547 dead transitions. [2024-06-14 11:53:52,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 547 transitions, 10278 flow [2024-06-14 11:53:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:53:52,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:53:52,715 INFO L175 Difference]: Start difference. First operand has 298 places, 504 transitions, 8427 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:53:52,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 547 transitions, 10278 flow [2024-06-14 11:53:54,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 547 transitions, 9997 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:54,420 INFO L231 Difference]: Finished difference. Result has 301 places, 519 transitions, 9011 flow [2024-06-14 11:53:54,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8158, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9011, PETRI_PLACES=301, PETRI_TRANSITIONS=519} [2024-06-14 11:53:54,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 11:53:54,421 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 519 transitions, 9011 flow [2024-06-14 11:53:54,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:54,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:54,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:54,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:53:54,421 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:54,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1270663246, now seen corresponding path program 3 times [2024-06-14 11:53:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:54,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533798053] [2024-06-14 11:53:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533798053] [2024-06-14 11:53:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533798053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347532502] [2024-06-14 11:53:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 519 transitions, 9011 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:57,128 INFO L124 PetriNetUnfolderBase]: 5217/7922 cut-off events. [2024-06-14 11:53:57,129 INFO L125 PetriNetUnfolderBase]: For 807813/807826 co-relation queries the response was YES. [2024-06-14 11:53:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74743 conditions, 7922 events. 5217/7922 cut-off events. For 807813/807826 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45236 event pairs, 1468 based on Foata normal form. 14/7933 useless extension candidates. Maximal degree in co-relation 74595. Up to 7507 conditions per place. [2024-06-14 11:53:57,242 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 418 selfloop transitions, 131 changer transitions 0/552 dead transitions. [2024-06-14 11:53:57,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 552 transitions, 10859 flow [2024-06-14 11:53:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:53:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:53:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:53:57,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 11:53:57,243 INFO L175 Difference]: Start difference. First operand has 301 places, 519 transitions, 9011 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:53:57,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 552 transitions, 10859 flow [2024-06-14 11:53:59,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 552 transitions, 10672 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:59,039 INFO L231 Difference]: Finished difference. Result has 305 places, 532 transitions, 9552 flow [2024-06-14 11:53:59,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8828, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9552, PETRI_PLACES=305, PETRI_TRANSITIONS=532} [2024-06-14 11:53:59,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 11:53:59,040 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 532 transitions, 9552 flow [2024-06-14 11:53:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:59,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:59,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:53:59,041 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1277329486, now seen corresponding path program 4 times [2024-06-14 11:53:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828594017] [2024-06-14 11:53:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828594017] [2024-06-14 11:53:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828594017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:59,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:53:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706570954] [2024-06-14 11:53:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:53:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:53:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:53:59,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:53:59,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 532 transitions, 9552 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:59,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:59,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:53:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:01,546 INFO L124 PetriNetUnfolderBase]: 5211/7908 cut-off events. [2024-06-14 11:54:01,547 INFO L125 PetriNetUnfolderBase]: For 797258/797271 co-relation queries the response was YES. [2024-06-14 11:54:01,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74833 conditions, 7908 events. 5211/7908 cut-off events. For 797258/797271 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 45090 event pairs, 1446 based on Foata normal form. 12/7917 useless extension candidates. Maximal degree in co-relation 74683. Up to 7502 conditions per place. [2024-06-14 11:54:01,663 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 126 changer transitions 0/548 dead transitions. [2024-06-14 11:54:01,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 548 transitions, 10974 flow [2024-06-14 11:54:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 11:54:01,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 11:54:01,664 INFO L175 Difference]: Start difference. First operand has 305 places, 532 transitions, 9552 flow. Second operand 7 states and 125 transitions. [2024-06-14 11:54:01,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 548 transitions, 10974 flow [2024-06-14 11:54:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 548 transitions, 10799 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:03,372 INFO L231 Difference]: Finished difference. Result has 308 places, 532 transitions, 9656 flow [2024-06-14 11:54:03,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9381, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9656, PETRI_PLACES=308, PETRI_TRANSITIONS=532} [2024-06-14 11:54:03,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-14 11:54:03,373 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 532 transitions, 9656 flow [2024-06-14 11:54:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:03,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:03,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:03,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:54:03,374 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)] === [2024-06-14 11:54:03,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2126443983, now seen corresponding path program 2 times [2024-06-14 11:54:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:03,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404165008] [2024-06-14 11:54:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:04,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:04,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404165008] [2024-06-14 11:54:04,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404165008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:04,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:04,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481041237] [2024-06-14 11:54:04,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:04,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:04,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:54:04,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 532 transitions, 9656 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:04,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:04,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:54:04,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:06,834 INFO L124 PetriNetUnfolderBase]: 5145/7851 cut-off events. [2024-06-14 11:54:06,834 INFO L125 PetriNetUnfolderBase]: For 830063/830083 co-relation queries the response was YES. [2024-06-14 11:54:06,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75490 conditions, 7851 events. 5145/7851 cut-off events. For 830063/830083 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45390 event pairs, 1246 based on Foata normal form. 12/7828 useless extension candidates. Maximal degree in co-relation 75340. Up to 6662 conditions per place. [2024-06-14 11:54:06,950 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 416 selfloop transitions, 141 changer transitions 0/599 dead transitions. [2024-06-14 11:54:06,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 599 transitions, 11271 flow [2024-06-14 11:54:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:54:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:54:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-14 11:54:06,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:54:06,952 INFO L175 Difference]: Start difference. First operand has 308 places, 532 transitions, 9656 flow. Second operand 12 states and 222 transitions. [2024-06-14 11:54:06,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 599 transitions, 11271 flow [2024-06-14 11:54:08,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 599 transitions, 11078 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:08,878 INFO L231 Difference]: Finished difference. Result has 318 places, 548 transitions, 10068 flow [2024-06-14 11:54:08,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9463, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10068, PETRI_PLACES=318, PETRI_TRANSITIONS=548} [2024-06-14 11:54:08,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 11:54:08,878 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 548 transitions, 10068 flow [2024-06-14 11:54:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:08,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:08,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:08,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:54:08,879 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)] === [2024-06-14 11:54:08,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash -561402331, now seen corresponding path program 2 times [2024-06-14 11:54:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524976907] [2024-06-14 11:54:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524976907] [2024-06-14 11:54:09,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524976907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:09,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:09,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:54:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663565083] [2024-06-14 11:54:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:54:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:54:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:54:09,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:09,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 548 transitions, 10068 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:09,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:09,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:09,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:11,817 INFO L124 PetriNetUnfolderBase]: 5336/8080 cut-off events. [2024-06-14 11:54:11,817 INFO L125 PetriNetUnfolderBase]: For 833914/833921 co-relation queries the response was YES. [2024-06-14 11:54:11,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78037 conditions, 8080 events. 5336/8080 cut-off events. For 833914/833921 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 46116 event pairs, 1460 based on Foata normal form. 12/8089 useless extension candidates. Maximal degree in co-relation 77884. Up to 7195 conditions per place. [2024-06-14 11:54:11,950 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 415 selfloop transitions, 189 changer transitions 0/607 dead transitions. [2024-06-14 11:54:11,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 607 transitions, 12147 flow [2024-06-14 11:54:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:54:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:54:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-14 11:54:11,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42829457364341084 [2024-06-14 11:54:11,951 INFO L175 Difference]: Start difference. First operand has 318 places, 548 transitions, 10068 flow. Second operand 12 states and 221 transitions. [2024-06-14 11:54:11,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 607 transitions, 12147 flow [2024-06-14 11:54:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 607 transitions, 11886 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:13,968 INFO L231 Difference]: Finished difference. Result has 326 places, 563 transitions, 10494 flow [2024-06-14 11:54:13,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9813, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10494, PETRI_PLACES=326, PETRI_TRANSITIONS=563} [2024-06-14 11:54:13,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 11:54:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 563 transitions, 10494 flow [2024-06-14 11:54:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:54:13,969 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)] === [2024-06-14 11:54:13,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1277325518, now seen corresponding path program 5 times [2024-06-14 11:54:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799131038] [2024-06-14 11:54:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:14,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:14,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799131038] [2024-06-14 11:54:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799131038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:14,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505446460] [2024-06-14 11:54:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:14,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:14,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 563 transitions, 10494 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:14,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:14,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:14,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:16,750 INFO L124 PetriNetUnfolderBase]: 5348/8100 cut-off events. [2024-06-14 11:54:16,750 INFO L125 PetriNetUnfolderBase]: For 827014/827027 co-relation queries the response was YES. [2024-06-14 11:54:16,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79308 conditions, 8100 events. 5348/8100 cut-off events. For 827014/827027 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 46224 event pairs, 1465 based on Foata normal form. 12/8109 useless extension candidates. Maximal degree in co-relation 79152. Up to 7678 conditions per place. [2024-06-14 11:54:16,882 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 444 selfloop transitions, 137 changer transitions 0/584 dead transitions. [2024-06-14 11:54:16,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 584 transitions, 12068 flow [2024-06-14 11:54:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 11:54:16,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 11:54:16,883 INFO L175 Difference]: Start difference. First operand has 326 places, 563 transitions, 10494 flow. Second operand 8 states and 138 transitions. [2024-06-14 11:54:16,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 584 transitions, 12068 flow [2024-06-14 11:54:18,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 584 transitions, 11787 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:18,844 INFO L231 Difference]: Finished difference. Result has 327 places, 567 transitions, 10586 flow [2024-06-14 11:54:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10213, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10586, PETRI_PLACES=327, PETRI_TRANSITIONS=567} [2024-06-14 11:54:18,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-14 11:54:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 567 transitions, 10586 flow [2024-06-14 11:54:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:18,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:18,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:54:18,846 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:18,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1310603594, now seen corresponding path program 6 times [2024-06-14 11:54:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:18,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372388385] [2024-06-14 11:54:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:19,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372388385] [2024-06-14 11:54:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372388385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:19,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:19,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:19,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080329514] [2024-06-14 11:54:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:19,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 567 transitions, 10586 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:19,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:19,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:21,704 INFO L124 PetriNetUnfolderBase]: 5480/8283 cut-off events. [2024-06-14 11:54:21,704 INFO L125 PetriNetUnfolderBase]: For 884314/884327 co-relation queries the response was YES. [2024-06-14 11:54:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81735 conditions, 8283 events. 5480/8283 cut-off events. For 884314/884327 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47443 event pairs, 1453 based on Foata normal form. 16/8296 useless extension candidates. Maximal degree in co-relation 81577. Up to 7373 conditions per place. [2024-06-14 11:54:21,827 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 424 selfloop transitions, 190 changer transitions 0/617 dead transitions. [2024-06-14 11:54:21,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 617 transitions, 12939 flow [2024-06-14 11:54:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:54:21,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 11:54:21,829 INFO L175 Difference]: Start difference. First operand has 327 places, 567 transitions, 10586 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:54:21,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 617 transitions, 12939 flow [2024-06-14 11:54:23,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 617 transitions, 12616 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:23,780 INFO L231 Difference]: Finished difference. Result has 329 places, 588 transitions, 11295 flow [2024-06-14 11:54:23,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10269, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11295, PETRI_PLACES=329, PETRI_TRANSITIONS=588} [2024-06-14 11:54:23,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 11:54:23,781 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 588 transitions, 11295 flow [2024-06-14 11:54:23,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:23,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:23,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:23,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:54:23,782 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)] === [2024-06-14 11:54:23,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1277337980, now seen corresponding path program 7 times [2024-06-14 11:54:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:23,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205770233] [2024-06-14 11:54:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:24,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:24,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205770233] [2024-06-14 11:54:24,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205770233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:24,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095038589] [2024-06-14 11:54:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:24,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:24,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 588 transitions, 11295 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:24,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:24,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:24,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:26,750 INFO L124 PetriNetUnfolderBase]: 5468/8268 cut-off events. [2024-06-14 11:54:26,751 INFO L125 PetriNetUnfolderBase]: For 871633/871646 co-relation queries the response was YES. [2024-06-14 11:54:26,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81834 conditions, 8268 events. 5468/8268 cut-off events. For 871633/871646 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 47271 event pairs, 1455 based on Foata normal form. 16/8281 useless extension candidates. Maximal degree in co-relation 81675. Up to 7369 conditions per place. [2024-06-14 11:54:26,870 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 422 selfloop transitions, 189 changer transitions 0/614 dead transitions. [2024-06-14 11:54:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 614 transitions, 13093 flow [2024-06-14 11:54:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:54:26,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:54:26,872 INFO L175 Difference]: Start difference. First operand has 329 places, 588 transitions, 11295 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:54:26,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 614 transitions, 13093 flow [2024-06-14 11:54:28,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 614 transitions, 12746 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:28,910 INFO L231 Difference]: Finished difference. Result has 334 places, 588 transitions, 11350 flow [2024-06-14 11:54:28,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10948, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11350, PETRI_PLACES=334, PETRI_TRANSITIONS=588} [2024-06-14 11:54:28,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 11:54:28,911 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 588 transitions, 11350 flow [2024-06-14 11:54:28,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:28,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:28,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:54:28,911 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:28,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash 51538702, now seen corresponding path program 5 times [2024-06-14 11:54:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:28,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804379233] [2024-06-14 11:54:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804379233] [2024-06-14 11:54:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804379233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:29,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538557842] [2024-06-14 11:54:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:29,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 588 transitions, 11350 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:29,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:29,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:31,647 INFO L124 PetriNetUnfolderBase]: 5442/8241 cut-off events. [2024-06-14 11:54:31,647 INFO L125 PetriNetUnfolderBase]: For 883347/883347 co-relation queries the response was YES. [2024-06-14 11:54:31,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81371 conditions, 8241 events. 5442/8241 cut-off events. For 883347/883347 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47222 event pairs, 2151 based on Foata normal form. 2/8241 useless extension candidates. Maximal degree in co-relation 81211. Up to 8138 conditions per place. [2024-06-14 11:54:31,748 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 570 selfloop transitions, 31 changer transitions 0/604 dead transitions. [2024-06-14 11:54:31,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 604 transitions, 12765 flow [2024-06-14 11:54:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 11:54:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:54:31,750 INFO L175 Difference]: Start difference. First operand has 334 places, 588 transitions, 11350 flow. Second operand 7 states and 119 transitions. [2024-06-14 11:54:31,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 604 transitions, 12765 flow [2024-06-14 11:54:33,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 604 transitions, 12350 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:33,705 INFO L231 Difference]: Finished difference. Result has 334 places, 588 transitions, 11009 flow [2024-06-14 11:54:33,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10937, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11009, PETRI_PLACES=334, PETRI_TRANSITIONS=588} [2024-06-14 11:54:33,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 11:54:33,706 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 588 transitions, 11009 flow [2024-06-14 11:54:33,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:33,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:33,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:33,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:54:33,707 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:33,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1716775284, now seen corresponding path program 6 times [2024-06-14 11:54:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001060806] [2024-06-14 11:54:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:34,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:34,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001060806] [2024-06-14 11:54:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001060806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:34,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:34,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053558175] [2024-06-14 11:54:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:34,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:34,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 588 transitions, 11009 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:34,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:34,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:34,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:36,272 INFO L124 PetriNetUnfolderBase]: 5447/8242 cut-off events. [2024-06-14 11:54:36,273 INFO L125 PetriNetUnfolderBase]: For 876835/876835 co-relation queries the response was YES. [2024-06-14 11:54:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80669 conditions, 8242 events. 5447/8242 cut-off events. For 876835/876835 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 47184 event pairs, 2146 based on Foata normal form. 1/8241 useless extension candidates. Maximal degree in co-relation 80509. Up to 8165 conditions per place. [2024-06-14 11:54:36,411 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 580 selfloop transitions, 20 changer transitions 0/603 dead transitions. [2024-06-14 11:54:36,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 603 transitions, 12347 flow [2024-06-14 11:54:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 11:54:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 11:54:36,412 INFO L175 Difference]: Start difference. First operand has 334 places, 588 transitions, 11009 flow. Second operand 7 states and 114 transitions. [2024-06-14 11:54:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 603 transitions, 12347 flow [2024-06-14 11:54:38,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 603 transitions, 11982 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:54:38,601 INFO L231 Difference]: Finished difference. Result has 333 places, 591 transitions, 10792 flow [2024-06-14 11:54:38,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10792, PETRI_PLACES=333, PETRI_TRANSITIONS=591} [2024-06-14 11:54:38,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 11:54:38,602 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 591 transitions, 10792 flow [2024-06-14 11:54:38,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:38,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:38,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:54:38,603 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:38,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1318300198, now seen corresponding path program 7 times [2024-06-14 11:54:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:38,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590221745] [2024-06-14 11:54:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590221745] [2024-06-14 11:54:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590221745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:39,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:39,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16931054] [2024-06-14 11:54:39,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:39,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 591 transitions, 10792 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:39,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:39,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:41,144 INFO L124 PetriNetUnfolderBase]: 5444/8239 cut-off events. [2024-06-14 11:54:41,145 INFO L125 PetriNetUnfolderBase]: For 888885/888888 co-relation queries the response was YES. [2024-06-14 11:54:41,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80492 conditions, 8239 events. 5444/8239 cut-off events. For 888885/888888 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 47211 event pairs, 2152 based on Foata normal form. 3/8239 useless extension candidates. Maximal degree in co-relation 80332. Up to 8161 conditions per place. [2024-06-14 11:54:41,269 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 577 selfloop transitions, 20 changer transitions 0/600 dead transitions. [2024-06-14 11:54:41,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 600 transitions, 12014 flow [2024-06-14 11:54:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 11:54:41,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 11:54:41,271 INFO L175 Difference]: Start difference. First operand has 333 places, 591 transitions, 10792 flow. Second operand 7 states and 111 transitions. [2024-06-14 11:54:41,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 600 transitions, 12014 flow [2024-06-14 11:54:43,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 600 transitions, 11942 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:43,239 INFO L231 Difference]: Finished difference. Result has 335 places, 591 transitions, 10766 flow [2024-06-14 11:54:43,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10720, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10766, PETRI_PLACES=335, PETRI_TRANSITIONS=591} [2024-06-14 11:54:43,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 11:54:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 591 transitions, 10766 flow [2024-06-14 11:54:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:43,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:54:43,240 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:43,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 791743498, now seen corresponding path program 8 times [2024-06-14 11:54:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014198617] [2024-06-14 11:54:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:43,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014198617] [2024-06-14 11:54:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014198617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:54:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536344883] [2024-06-14 11:54:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:54:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:54:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:54:44,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 591 transitions, 10766 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:44,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:45,995 INFO L124 PetriNetUnfolderBase]: 5436/8228 cut-off events. [2024-06-14 11:54:45,995 INFO L125 PetriNetUnfolderBase]: For 906054/906057 co-relation queries the response was YES. [2024-06-14 11:54:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80458 conditions, 8228 events. 5436/8228 cut-off events. For 906054/906057 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47127 event pairs, 2153 based on Foata normal form. 4/8229 useless extension candidates. Maximal degree in co-relation 80297. Up to 8128 conditions per place. [2024-06-14 11:54:46,103 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 30 changer transitions 0/600 dead transitions. [2024-06-14 11:54:46,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 600 transitions, 11988 flow [2024-06-14 11:54:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:54:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:54:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 11:54:46,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 11:54:46,105 INFO L175 Difference]: Start difference. First operand has 335 places, 591 transitions, 10766 flow. Second operand 7 states and 114 transitions. [2024-06-14 11:54:46,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 600 transitions, 11988 flow [2024-06-14 11:54:47,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 600 transitions, 11913 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:47,883 INFO L231 Difference]: Finished difference. Result has 336 places, 591 transitions, 10759 flow [2024-06-14 11:54:47,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10691, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10759, PETRI_PLACES=336, PETRI_TRANSITIONS=591} [2024-06-14 11:54:47,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 11:54:47,884 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 591 transitions, 10759 flow [2024-06-14 11:54:47,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:47,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:47,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:54:47,885 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)] === [2024-06-14 11:54:47,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2034476835, now seen corresponding path program 3 times [2024-06-14 11:54:47,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:47,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773735113] [2024-06-14 11:54:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773735113] [2024-06-14 11:54:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773735113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595639679] [2024-06-14 11:54:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:49,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:54:49,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 591 transitions, 10759 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:49,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:49,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:54:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:51,090 INFO L124 PetriNetUnfolderBase]: 5378/8185 cut-off events. [2024-06-14 11:54:51,091 INFO L125 PetriNetUnfolderBase]: For 965015/965025 co-relation queries the response was YES. [2024-06-14 11:54:51,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81514 conditions, 8185 events. 5378/8185 cut-off events. For 965015/965025 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 47553 event pairs, 2052 based on Foata normal form. 4/8134 useless extension candidates. Maximal degree in co-relation 81352. Up to 7774 conditions per place. [2024-06-14 11:54:51,218 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 553 selfloop transitions, 31 changer transitions 0/628 dead transitions. [2024-06-14 11:54:51,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 628 transitions, 12158 flow [2024-06-14 11:54:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:54:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:54:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 11:54:51,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 11:54:51,220 INFO L175 Difference]: Start difference. First operand has 336 places, 591 transitions, 10759 flow. Second operand 10 states and 176 transitions. [2024-06-14 11:54:51,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 628 transitions, 12158 flow [2024-06-14 11:54:53,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 628 transitions, 12040 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:53,347 INFO L231 Difference]: Finished difference. Result has 340 places, 595 transitions, 10828 flow [2024-06-14 11:54:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10641, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10828, PETRI_PLACES=340, PETRI_TRANSITIONS=595} [2024-06-14 11:54:53,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 11:54:53,348 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 595 transitions, 10828 flow [2024-06-14 11:54:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:53,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:53,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:54:53,349 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:53,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1938955585, now seen corresponding path program 1 times [2024-06-14 11:54:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344159372] [2024-06-14 11:54:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:54,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:54,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344159372] [2024-06-14 11:54:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344159372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:54,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465722808] [2024-06-14 11:54:54,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:54,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:54,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:54,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:54:54,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 595 transitions, 10828 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:54,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:54,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:54:54,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:56,432 INFO L124 PetriNetUnfolderBase]: 5548/8384 cut-off events. [2024-06-14 11:54:56,433 INFO L125 PetriNetUnfolderBase]: For 983410/983423 co-relation queries the response was YES. [2024-06-14 11:54:56,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83236 conditions, 8384 events. 5548/8384 cut-off events. For 983410/983423 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 48087 event pairs, 1458 based on Foata normal form. 16/8397 useless extension candidates. Maximal degree in co-relation 83072. Up to 7618 conditions per place. [2024-06-14 11:54:56,571 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 467 selfloop transitions, 171 changer transitions 0/641 dead transitions. [2024-06-14 11:54:56,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 641 transitions, 13078 flow [2024-06-14 11:54:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:54:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:54:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:54:56,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 11:54:56,572 INFO L175 Difference]: Start difference. First operand has 340 places, 595 transitions, 10828 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:54:56,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 641 transitions, 13078 flow [2024-06-14 11:54:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 641 transitions, 12971 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:58,677 INFO L231 Difference]: Finished difference. Result has 346 places, 610 transitions, 11526 flow [2024-06-14 11:54:58,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11526, PETRI_PLACES=346, PETRI_TRANSITIONS=610} [2024-06-14 11:54:58,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 11:54:58,678 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 610 transitions, 11526 flow [2024-06-14 11:54:58,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:58,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:58,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:54:58,679 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)] === [2024-06-14 11:54:58,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1329605365, now seen corresponding path program 4 times [2024-06-14 11:54:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542707567] [2024-06-14 11:54:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:58,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542707567] [2024-06-14 11:54:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542707567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:59,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998019279] [2024-06-14 11:54:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:59,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:54:59,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 610 transitions, 11526 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:59,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:59,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:54:59,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:02,154 INFO L124 PetriNetUnfolderBase]: 5467/8313 cut-off events. [2024-06-14 11:55:02,154 INFO L125 PetriNetUnfolderBase]: For 1033374/1033384 co-relation queries the response was YES. [2024-06-14 11:55:02,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84635 conditions, 8313 events. 5467/8313 cut-off events. For 1033374/1033384 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48349 event pairs, 2035 based on Foata normal form. 4/8262 useless extension candidates. Maximal degree in co-relation 84468. Up to 7787 conditions per place. [2024-06-14 11:55:02,279 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 561 selfloop transitions, 58 changer transitions 0/663 dead transitions. [2024-06-14 11:55:02,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 663 transitions, 13132 flow [2024-06-14 11:55:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:55:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:55:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-14 11:55:02,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 11:55:02,280 INFO L175 Difference]: Start difference. First operand has 346 places, 610 transitions, 11526 flow. Second operand 12 states and 213 transitions. [2024-06-14 11:55:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 663 transitions, 13132 flow [2024-06-14 11:55:05,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 663 transitions, 12873 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:05,199 INFO L231 Difference]: Finished difference. Result has 355 places, 619 transitions, 11590 flow [2024-06-14 11:55:05,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11269, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11590, PETRI_PLACES=355, PETRI_TRANSITIONS=619} [2024-06-14 11:55:05,200 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 11:55:05,200 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 619 transitions, 11590 flow [2024-06-14 11:55:05,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:05,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:05,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:55:05,200 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)] === [2024-06-14 11:55:05,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1649254143, now seen corresponding path program 3 times [2024-06-14 11:55:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:05,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871059409] [2024-06-14 11:55:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:05,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871059409] [2024-06-14 11:55:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871059409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732296778] [2024-06-14 11:55:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:06,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:55:06,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 619 transitions, 11590 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:06,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:55:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:08,390 INFO L124 PetriNetUnfolderBase]: 5633/8503 cut-off events. [2024-06-14 11:55:08,390 INFO L125 PetriNetUnfolderBase]: For 1026598/1026605 co-relation queries the response was YES. [2024-06-14 11:55:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85660 conditions, 8503 events. 5633/8503 cut-off events. For 1026598/1026605 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 48834 event pairs, 1478 based on Foata normal form. 8/8508 useless extension candidates. Maximal degree in co-relation 85490. Up to 7650 conditions per place. [2024-06-14 11:55:08,525 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 450 selfloop transitions, 248 changer transitions 0/701 dead transitions. [2024-06-14 11:55:08,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 701 transitions, 14297 flow [2024-06-14 11:55:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 11:55:08,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 11:55:08,527 INFO L175 Difference]: Start difference. First operand has 355 places, 619 transitions, 11590 flow. Second operand 9 states and 169 transitions. [2024-06-14 11:55:08,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 701 transitions, 14297 flow [2024-06-14 11:55:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 701 transitions, 14128 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:11,258 INFO L231 Difference]: Finished difference. Result has 361 places, 668 transitions, 13020 flow [2024-06-14 11:55:11,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11421, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13020, PETRI_PLACES=361, PETRI_TRANSITIONS=668} [2024-06-14 11:55:11,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 11:55:11,260 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 668 transitions, 13020 flow [2024-06-14 11:55:11,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:11,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:11,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:55:11,260 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)] === [2024-06-14 11:55:11,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1695645839, now seen corresponding path program 5 times [2024-06-14 11:55:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800949602] [2024-06-14 11:55:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:12,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800949602] [2024-06-14 11:55:12,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800949602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:12,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:12,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:55:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860376659] [2024-06-14 11:55:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:12,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:55:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:55:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:55:12,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:12,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 668 transitions, 13020 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:12,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:12,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:12,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:15,069 INFO L124 PetriNetUnfolderBase]: 5542/8420 cut-off events. [2024-06-14 11:55:15,069 INFO L125 PetriNetUnfolderBase]: For 1093492/1093501 co-relation queries the response was YES. [2024-06-14 11:55:15,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88252 conditions, 8420 events. 5542/8420 cut-off events. For 1093492/1093501 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48954 event pairs, 2059 based on Foata normal form. 4/8369 useless extension candidates. Maximal degree in co-relation 88076. Up to 8048 conditions per place. [2024-06-14 11:55:15,201 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 632 selfloop transitions, 23 changer transitions 0/703 dead transitions. [2024-06-14 11:55:15,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 703 transitions, 14524 flow [2024-06-14 11:55:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 11:55:15,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 11:55:15,203 INFO L175 Difference]: Start difference. First operand has 361 places, 668 transitions, 13020 flow. Second operand 10 states and 174 transitions. [2024-06-14 11:55:15,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 703 transitions, 14524 flow [2024-06-14 11:55:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 703 transitions, 14325 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-06-14 11:55:17,955 INFO L231 Difference]: Finished difference. Result has 369 places, 670 transitions, 12948 flow [2024-06-14 11:55:17,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12821, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12948, PETRI_PLACES=369, PETRI_TRANSITIONS=670} [2024-06-14 11:55:17,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-14 11:55:17,955 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 670 transitions, 12948 flow [2024-06-14 11:55:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:17,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:17,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:17,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:55:17,956 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:17,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash -528075591, now seen corresponding path program 1 times [2024-06-14 11:55:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:17,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006497240] [2024-06-14 11:55:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:17,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:19,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006497240] [2024-06-14 11:55:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006497240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:19,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:55:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466657709] [2024-06-14 11:55:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:55:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:55:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:55:19,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:19,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 670 transitions, 12948 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:19,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:19,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:19,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:21,425 INFO L124 PetriNetUnfolderBase]: 5559/8445 cut-off events. [2024-06-14 11:55:21,425 INFO L125 PetriNetUnfolderBase]: For 1109525/1109534 co-relation queries the response was YES. [2024-06-14 11:55:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88444 conditions, 8445 events. 5559/8445 cut-off events. For 1109525/1109534 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 49193 event pairs, 2060 based on Foata normal form. 2/8392 useless extension candidates. Maximal degree in co-relation 88266. Up to 8020 conditions per place. [2024-06-14 11:55:21,558 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 620 selfloop transitions, 40 changer transitions 0/708 dead transitions. [2024-06-14 11:55:21,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 708 transitions, 14450 flow [2024-06-14 11:55:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 11:55:21,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 11:55:21,560 INFO L175 Difference]: Start difference. First operand has 369 places, 670 transitions, 12948 flow. Second operand 10 states and 177 transitions. [2024-06-14 11:55:21,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 708 transitions, 14450 flow [2024-06-14 11:55:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 708 transitions, 14325 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:24,400 INFO L231 Difference]: Finished difference. Result has 371 places, 673 transitions, 12956 flow [2024-06-14 11:55:24,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12823, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12956, PETRI_PLACES=371, PETRI_TRANSITIONS=673} [2024-06-14 11:55:24,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 11:55:24,401 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 673 transitions, 12956 flow [2024-06-14 11:55:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:24,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:24,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:24,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:55:24,401 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)] === [2024-06-14 11:55:24,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2036944739, now seen corresponding path program 6 times [2024-06-14 11:55:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:24,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140676224] [2024-06-14 11:55:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:24,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140676224] [2024-06-14 11:55:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140676224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:25,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:25,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:55:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518697276] [2024-06-14 11:55:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:25,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:55:25,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:55:25,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:55:25,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 673 transitions, 12956 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:28,242 INFO L124 PetriNetUnfolderBase]: 5576/8472 cut-off events. [2024-06-14 11:55:28,242 INFO L125 PetriNetUnfolderBase]: For 1139071/1139080 co-relation queries the response was YES. [2024-06-14 11:55:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88960 conditions, 8472 events. 5576/8472 cut-off events. For 1139071/1139080 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 49418 event pairs, 2065 based on Foata normal form. 4/8421 useless extension candidates. Maximal degree in co-relation 88781. Up to 8046 conditions per place. [2024-06-14 11:55:28,386 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 624 selfloop transitions, 38 changer transitions 0/710 dead transitions. [2024-06-14 11:55:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 710 transitions, 14500 flow [2024-06-14 11:55:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 11:55:28,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 11:55:28,388 INFO L175 Difference]: Start difference. First operand has 371 places, 673 transitions, 12956 flow. Second operand 10 states and 176 transitions. [2024-06-14 11:55:28,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 710 transitions, 14500 flow [2024-06-14 11:55:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 710 transitions, 14370 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:31,552 INFO L231 Difference]: Finished difference. Result has 373 places, 675 transitions, 12991 flow [2024-06-14 11:55:31,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12826, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12991, PETRI_PLACES=373, PETRI_TRANSITIONS=675} [2024-06-14 11:55:31,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 11:55:31,553 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 675 transitions, 12991 flow [2024-06-14 11:55:31,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:31,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:31,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:55:31,554 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)] === [2024-06-14 11:55:31,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -251010673, now seen corresponding path program 7 times [2024-06-14 11:55:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873437377] [2024-06-14 11:55:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873437377] [2024-06-14 11:55:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873437377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:32,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:32,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:55:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802724183] [2024-06-14 11:55:32,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:32,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:55:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:32,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:55:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:55:32,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:32,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 675 transitions, 12991 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:35,367 INFO L124 PetriNetUnfolderBase]: 5593/8501 cut-off events. [2024-06-14 11:55:35,368 INFO L125 PetriNetUnfolderBase]: For 1168111/1168120 co-relation queries the response was YES. [2024-06-14 11:55:35,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89587 conditions, 8501 events. 5593/8501 cut-off events. For 1168111/1168120 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49598 event pairs, 2074 based on Foata normal form. 4/8450 useless extension candidates. Maximal degree in co-relation 89406. Up to 7988 conditions per place. [2024-06-14 11:55:35,509 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 619 selfloop transitions, 44 changer transitions 0/711 dead transitions. [2024-06-14 11:55:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 711 transitions, 14530 flow [2024-06-14 11:55:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 11:55:35,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 11:55:35,510 INFO L175 Difference]: Start difference. First operand has 373 places, 675 transitions, 12991 flow. Second operand 10 states and 177 transitions. [2024-06-14 11:55:35,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 711 transitions, 14530 flow [2024-06-14 11:55:38,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 711 transitions, 14395 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:38,500 INFO L231 Difference]: Finished difference. Result has 375 places, 677 transitions, 13036 flow [2024-06-14 11:55:38,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12856, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13036, PETRI_PLACES=375, PETRI_TRANSITIONS=677} [2024-06-14 11:55:38,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 11:55:38,501 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 677 transitions, 13036 flow [2024-06-14 11:55:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:38,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:38,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:55:38,501 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)] === [2024-06-14 11:55:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2028342317, now seen corresponding path program 8 times [2024-06-14 11:55:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:38,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559886249] [2024-06-14 11:55:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559886249] [2024-06-14 11:55:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559886249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:39,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:39,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:55:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728530387] [2024-06-14 11:55:39,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:39,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:55:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:55:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:55:39,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 677 transitions, 13036 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:42,231 INFO L124 PetriNetUnfolderBase]: 5585/8487 cut-off events. [2024-06-14 11:55:42,231 INFO L125 PetriNetUnfolderBase]: For 1184457/1184466 co-relation queries the response was YES. [2024-06-14 11:55:42,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89554 conditions, 8487 events. 5585/8487 cut-off events. For 1184457/1184466 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49504 event pairs, 2065 based on Foata normal form. 4/8436 useless extension candidates. Maximal degree in co-relation 89372. Up to 7965 conditions per place. [2024-06-14 11:55:42,383 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 624 selfloop transitions, 48 changer transitions 0/720 dead transitions. [2024-06-14 11:55:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 720 transitions, 14722 flow [2024-06-14 11:55:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 11:55:42,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:55:42,384 INFO L175 Difference]: Start difference. First operand has 375 places, 677 transitions, 13036 flow. Second operand 10 states and 180 transitions. [2024-06-14 11:55:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 720 transitions, 14722 flow [2024-06-14 11:55:45,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 720 transitions, 14562 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:45,439 INFO L231 Difference]: Finished difference. Result has 379 places, 686 transitions, 13225 flow [2024-06-14 11:55:45,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12878, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13225, PETRI_PLACES=379, PETRI_TRANSITIONS=686} [2024-06-14 11:55:45,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 11:55:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 686 transitions, 13225 flow [2024-06-14 11:55:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:45,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:55:45,440 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:45,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 303579422, now seen corresponding path program 8 times [2024-06-14 11:55:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899237523] [2024-06-14 11:55:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:46,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:46,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899237523] [2024-06-14 11:55:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899237523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:46,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192368605] [2024-06-14 11:55:46,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:46,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:55:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 686 transitions, 13225 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:55:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:48,535 INFO L124 PetriNetUnfolderBase]: 5777/8723 cut-off events. [2024-06-14 11:55:48,535 INFO L125 PetriNetUnfolderBase]: For 1189587/1189590 co-relation queries the response was YES. [2024-06-14 11:55:48,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91651 conditions, 8723 events. 5777/8723 cut-off events. For 1189587/1189590 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50336 event pairs, 2191 based on Foata normal form. 8/8728 useless extension candidates. Maximal degree in co-relation 91466. Up to 8554 conditions per place. [2024-06-14 11:55:48,682 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 670 selfloop transitions, 42 changer transitions 0/715 dead transitions. [2024-06-14 11:55:48,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 715 transitions, 15285 flow [2024-06-14 11:55:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 11:55:48,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 11:55:48,683 INFO L175 Difference]: Start difference. First operand has 379 places, 686 transitions, 13225 flow. Second operand 8 states and 132 transitions. [2024-06-14 11:55:48,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 715 transitions, 15285 flow [2024-06-14 11:55:52,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 715 transitions, 15122 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-14 11:55:52,054 INFO L231 Difference]: Finished difference. Result has 384 places, 700 transitions, 13589 flow [2024-06-14 11:55:52,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13062, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13589, PETRI_PLACES=384, PETRI_TRANSITIONS=700} [2024-06-14 11:55:52,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 11:55:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 700 transitions, 13589 flow [2024-06-14 11:55:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:52,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:52,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:52,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:55:52,055 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:52,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 304055086, now seen corresponding path program 1 times [2024-06-14 11:55:52,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013922909] [2024-06-14 11:55:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:52,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013922909] [2024-06-14 11:55:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013922909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392912752] [2024-06-14 11:55:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:53,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:55:53,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 700 transitions, 13589 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:53,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:53,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:55:53,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:55,462 INFO L124 PetriNetUnfolderBase]: 5607/8528 cut-off events. [2024-06-14 11:55:55,462 INFO L125 PetriNetUnfolderBase]: For 1215495/1215560 co-relation queries the response was YES. [2024-06-14 11:55:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88913 conditions, 8528 events. 5607/8528 cut-off events. For 1215495/1215560 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50152 event pairs, 2114 based on Foata normal form. 57/8543 useless extension candidates. Maximal degree in co-relation 88725. Up to 8038 conditions per place. [2024-06-14 11:55:55,610 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 581 selfloop transitions, 20 changer transitions 0/716 dead transitions. [2024-06-14 11:55:55,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 716 transitions, 14959 flow [2024-06-14 11:55:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 11:55:55,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 11:55:55,611 INFO L175 Difference]: Start difference. First operand has 384 places, 700 transitions, 13589 flow. Second operand 8 states and 130 transitions. [2024-06-14 11:55:55,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 716 transitions, 14959 flow [2024-06-14 11:55:58,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 716 transitions, 14749 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:58,804 INFO L231 Difference]: Finished difference. Result has 387 places, 704 transitions, 13561 flow [2024-06-14 11:55:58,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13379, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13561, PETRI_PLACES=387, PETRI_TRANSITIONS=704} [2024-06-14 11:55:58,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-14 11:55:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 704 transitions, 13561 flow [2024-06-14 11:55:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:58,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:58,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:58,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:55:58,805 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:58,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 289769852, now seen corresponding path program 9 times [2024-06-14 11:55:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085602314] [2024-06-14 11:55:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085602314] [2024-06-14 11:55:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085602314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:59,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:59,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093837727] [2024-06-14 11:55:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:59,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:59,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:59,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:55:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 704 transitions, 13561 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:55:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:02,075 INFO L124 PetriNetUnfolderBase]: 5807/8766 cut-off events. [2024-06-14 11:56:02,076 INFO L125 PetriNetUnfolderBase]: For 1229094/1229097 co-relation queries the response was YES. [2024-06-14 11:56:02,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92005 conditions, 8766 events. 5807/8766 cut-off events. For 1229094/1229097 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50596 event pairs, 2186 based on Foata normal form. 8/8771 useless extension candidates. Maximal degree in co-relation 91817. Up to 8451 conditions per place. [2024-06-14 11:56:02,225 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 662 selfloop transitions, 66 changer transitions 0/731 dead transitions. [2024-06-14 11:56:02,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 731 transitions, 15703 flow [2024-06-14 11:56:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 11:56:02,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 11:56:02,227 INFO L175 Difference]: Start difference. First operand has 387 places, 704 transitions, 13561 flow. Second operand 8 states and 138 transitions. [2024-06-14 11:56:02,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 731 transitions, 15703 flow [2024-06-14 11:56:05,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 731 transitions, 15553 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:05,325 INFO L231 Difference]: Finished difference. Result has 389 places, 711 transitions, 13762 flow [2024-06-14 11:56:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13411, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13762, PETRI_PLACES=389, PETRI_TRANSITIONS=711} [2024-06-14 11:56:05,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 11:56:05,326 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 711 transitions, 13762 flow [2024-06-14 11:56:05,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:05,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:05,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:56:05,327 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 289757390, now seen corresponding path program 6 times [2024-06-14 11:56:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:05,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224413248] [2024-06-14 11:56:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:06,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:06,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224413248] [2024-06-14 11:56:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224413248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:06,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189395915] [2024-06-14 11:56:06,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:06,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 711 transitions, 13762 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:06,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:08,718 INFO L124 PetriNetUnfolderBase]: 5801/8758 cut-off events. [2024-06-14 11:56:08,719 INFO L125 PetriNetUnfolderBase]: For 1236336/1236339 co-relation queries the response was YES. [2024-06-14 11:56:08,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92165 conditions, 8758 events. 5801/8758 cut-off events. For 1236336/1236339 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 50538 event pairs, 2197 based on Foata normal form. 4/8759 useless extension candidates. Maximal degree in co-relation 91976. Up to 8652 conditions per place. [2024-06-14 11:56:08,871 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 682 selfloop transitions, 36 changer transitions 0/721 dead transitions. [2024-06-14 11:56:08,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 721 transitions, 15228 flow [2024-06-14 11:56:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 11:56:08,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 11:56:08,872 INFO L175 Difference]: Start difference. First operand has 389 places, 711 transitions, 13762 flow. Second operand 8 states and 127 transitions. [2024-06-14 11:56:08,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 721 transitions, 15228 flow [2024-06-14 11:56:12,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 721 transitions, 14698 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:12,198 INFO L231 Difference]: Finished difference. Result has 389 places, 711 transitions, 13311 flow [2024-06-14 11:56:12,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13232, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13311, PETRI_PLACES=389, PETRI_TRANSITIONS=711} [2024-06-14 11:56:12,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 11:56:12,199 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 711 transitions, 13311 flow [2024-06-14 11:56:12,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:12,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:12,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:56:12,199 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)] === [2024-06-14 11:56:12,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 289757762, now seen corresponding path program 10 times [2024-06-14 11:56:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:12,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115263606] [2024-06-14 11:56:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:12,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:12,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115263606] [2024-06-14 11:56:12,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115263606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:12,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:12,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85368511] [2024-06-14 11:56:12,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:12,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:12,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:13,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:13,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 711 transitions, 13311 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:13,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:13,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:15,358 INFO L124 PetriNetUnfolderBase]: 5783/8734 cut-off events. [2024-06-14 11:56:15,358 INFO L125 PetriNetUnfolderBase]: For 1247521/1247524 co-relation queries the response was YES. [2024-06-14 11:56:15,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90323 conditions, 8734 events. 5783/8734 cut-off events. For 1247521/1247524 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50394 event pairs, 2180 based on Foata normal form. 8/8739 useless extension candidates. Maximal degree in co-relation 90136. Up to 8432 conditions per place. [2024-06-14 11:56:15,512 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 650 selfloop transitions, 75 changer transitions 0/728 dead transitions. [2024-06-14 11:56:15,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 728 transitions, 15045 flow [2024-06-14 11:56:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 11:56:15,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 11:56:15,513 INFO L175 Difference]: Start difference. First operand has 389 places, 711 transitions, 13311 flow. Second operand 8 states and 137 transitions. [2024-06-14 11:56:15,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 728 transitions, 15045 flow [2024-06-14 11:56:18,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 728 transitions, 14814 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:18,841 INFO L231 Difference]: Finished difference. Result has 390 places, 711 transitions, 13240 flow [2024-06-14 11:56:18,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13080, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13240, PETRI_PLACES=390, PETRI_TRANSITIONS=711} [2024-06-14 11:56:18,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 11:56:18,842 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 711 transitions, 13240 flow [2024-06-14 11:56:18,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:18,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:18,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:56:18,842 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:18,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 59280518, now seen corresponding path program 1 times [2024-06-14 11:56:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:18,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752232977] [2024-06-14 11:56:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752232977] [2024-06-14 11:56:19,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752232977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:19,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:19,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135168660] [2024-06-14 11:56:19,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:19,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:19,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 711 transitions, 13240 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:19,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:19,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:22,141 INFO L124 PetriNetUnfolderBase]: 5793/8747 cut-off events. [2024-06-14 11:56:22,141 INFO L125 PetriNetUnfolderBase]: For 1255845/1255845 co-relation queries the response was YES. [2024-06-14 11:56:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90718 conditions, 8747 events. 5793/8747 cut-off events. For 1255845/1255845 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 50408 event pairs, 2187 based on Foata normal form. 2/8747 useless extension candidates. Maximal degree in co-relation 90530. Up to 8647 conditions per place. [2024-06-14 11:56:22,302 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 711 selfloop transitions, 20 changer transitions 0/734 dead transitions. [2024-06-14 11:56:22,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 734 transitions, 14822 flow [2024-06-14 11:56:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 11:56:22,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 11:56:22,304 INFO L175 Difference]: Start difference. First operand has 390 places, 711 transitions, 13240 flow. Second operand 8 states and 132 transitions. [2024-06-14 11:56:22,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 734 transitions, 14822 flow [2024-06-14 11:56:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 734 transitions, 14462 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:25,826 INFO L231 Difference]: Finished difference. Result has 391 places, 714 transitions, 12977 flow [2024-06-14 11:56:25,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12880, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12977, PETRI_PLACES=391, PETRI_TRANSITIONS=714} [2024-06-14 11:56:25,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-14 11:56:25,827 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 714 transitions, 12977 flow [2024-06-14 11:56:25,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:25,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:25,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:56:25,828 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:25,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash -989309090, now seen corresponding path program 2 times [2024-06-14 11:56:25,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:25,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898931018] [2024-06-14 11:56:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:26,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:26,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898931018] [2024-06-14 11:56:26,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898931018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:26,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:26,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:26,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470518177] [2024-06-14 11:56:26,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:26,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:26,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:26,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:26,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:26,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 714 transitions, 12977 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:26,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:26,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:26,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:29,117 INFO L124 PetriNetUnfolderBase]: 5803/8761 cut-off events. [2024-06-14 11:56:29,117 INFO L125 PetriNetUnfolderBase]: For 1275576/1275576 co-relation queries the response was YES. [2024-06-14 11:56:29,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91094 conditions, 8761 events. 5803/8761 cut-off events. For 1275576/1275576 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50536 event pairs, 2186 based on Foata normal form. 2/8761 useless extension candidates. Maximal degree in co-relation 90905. Up to 8626 conditions per place. [2024-06-14 11:56:29,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 698 selfloop transitions, 39 changer transitions 0/740 dead transitions. [2024-06-14 11:56:29,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 740 transitions, 14801 flow [2024-06-14 11:56:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 11:56:29,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:56:29,271 INFO L175 Difference]: Start difference. First operand has 391 places, 714 transitions, 12977 flow. Second operand 8 states and 136 transitions. [2024-06-14 11:56:29,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 740 transitions, 14801 flow [2024-06-14 11:56:33,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 740 transitions, 14718 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:33,156 INFO L231 Difference]: Finished difference. Result has 393 places, 720 transitions, 13084 flow [2024-06-14 11:56:33,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12894, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13084, PETRI_PLACES=393, PETRI_TRANSITIONS=720} [2024-06-14 11:56:33,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 11:56:33,159 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 720 transitions, 13084 flow [2024-06-14 11:56:33,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:33,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:33,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:56:33,160 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:33,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1820447574, now seen corresponding path program 1 times [2024-06-14 11:56:33,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714931494] [2024-06-14 11:56:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:33,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714931494] [2024-06-14 11:56:33,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714931494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:33,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:33,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:33,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241782482] [2024-06-14 11:56:33,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:33,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:33,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:34,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:34,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 720 transitions, 13084 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:34,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:34,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:34,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:36,565 INFO L124 PetriNetUnfolderBase]: 5818/8782 cut-off events. [2024-06-14 11:56:36,566 INFO L125 PetriNetUnfolderBase]: For 1308105/1308105 co-relation queries the response was YES. [2024-06-14 11:56:36,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91923 conditions, 8782 events. 5818/8782 cut-off events. For 1308105/1308105 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50642 event pairs, 2189 based on Foata normal form. 3/8783 useless extension candidates. Maximal degree in co-relation 91733. Up to 8607 conditions per place. [2024-06-14 11:56:36,726 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 689 selfloop transitions, 56 changer transitions 0/748 dead transitions. [2024-06-14 11:56:36,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 748 transitions, 14983 flow [2024-06-14 11:56:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:56:36,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 11:56:36,728 INFO L175 Difference]: Start difference. First operand has 393 places, 720 transitions, 13084 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:56:36,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 748 transitions, 14983 flow [2024-06-14 11:56:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 748 transitions, 14897 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:40,180 INFO L231 Difference]: Finished difference. Result has 397 places, 726 transitions, 13234 flow [2024-06-14 11:56:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12998, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13234, PETRI_PLACES=397, PETRI_TRANSITIONS=726} [2024-06-14 11:56:40,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 11:56:40,182 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 726 transitions, 13234 flow [2024-06-14 11:56:40,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:40,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:40,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:56:40,182 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash -984667274, now seen corresponding path program 2 times [2024-06-14 11:56:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205404552] [2024-06-14 11:56:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:40,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205404552] [2024-06-14 11:56:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205404552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584660951] [2024-06-14 11:56:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:41,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:41,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 726 transitions, 13234 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:41,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:41,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:41,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:43,651 INFO L124 PetriNetUnfolderBase]: 5857/8836 cut-off events. [2024-06-14 11:56:43,651 INFO L125 PetriNetUnfolderBase]: For 1350485/1350485 co-relation queries the response was YES. [2024-06-14 11:56:43,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93449 conditions, 8836 events. 5857/8836 cut-off events. For 1350485/1350485 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 50983 event pairs, 2191 based on Foata normal form. 3/8837 useless extension candidates. Maximal degree in co-relation 93257. Up to 8642 conditions per place. [2024-06-14 11:56:43,801 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 700 selfloop transitions, 55 changer transitions 0/758 dead transitions. [2024-06-14 11:56:43,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 758 transitions, 15405 flow [2024-06-14 11:56:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:56:43,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:56:43,803 INFO L175 Difference]: Start difference. First operand has 397 places, 726 transitions, 13234 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:56:43,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 758 transitions, 15405 flow [2024-06-14 11:56:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 758 transitions, 15238 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:46,817 INFO L231 Difference]: Finished difference. Result has 401 places, 732 transitions, 13307 flow [2024-06-14 11:56:46,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13115, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13307, PETRI_PLACES=401, PETRI_TRANSITIONS=732} [2024-06-14 11:56:46,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-14 11:56:46,817 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 732 transitions, 13307 flow [2024-06-14 11:56:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:46,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:46,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:56:46,818 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:46,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1815799434, now seen corresponding path program 3 times [2024-06-14 11:56:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329262237] [2024-06-14 11:56:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:47,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329262237] [2024-06-14 11:56:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329262237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:47,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130930457] [2024-06-14 11:56:47,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:47,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:47,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:47,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 732 transitions, 13307 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:47,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:47,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:47,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:50,188 INFO L124 PetriNetUnfolderBase]: 5848/8824 cut-off events. [2024-06-14 11:56:50,188 INFO L125 PetriNetUnfolderBase]: For 1362849/1362849 co-relation queries the response was YES. [2024-06-14 11:56:50,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93233 conditions, 8824 events. 5848/8824 cut-off events. For 1362849/1362849 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50905 event pairs, 2187 based on Foata normal form. 3/8825 useless extension candidates. Maximal degree in co-relation 93039. Up to 8635 conditions per place. [2024-06-14 11:56:50,342 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 696 selfloop transitions, 56 changer transitions 0/755 dead transitions. [2024-06-14 11:56:50,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 755 transitions, 15140 flow [2024-06-14 11:56:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 11:56:50,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 11:56:50,343 INFO L175 Difference]: Start difference. First operand has 401 places, 732 transitions, 13307 flow. Second operand 8 states and 140 transitions. [2024-06-14 11:56:50,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 755 transitions, 15140 flow [2024-06-14 11:56:54,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 755 transitions, 15029 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 11:56:54,394 INFO L231 Difference]: Finished difference. Result has 405 places, 732 transitions, 13316 flow [2024-06-14 11:56:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13196, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13316, PETRI_PLACES=405, PETRI_TRANSITIONS=732} [2024-06-14 11:56:54,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-14 11:56:54,394 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 732 transitions, 13316 flow [2024-06-14 11:56:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:54,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:56:54,395 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:54,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash -984667460, now seen corresponding path program 3 times [2024-06-14 11:56:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:54,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521419677] [2024-06-14 11:56:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521419677] [2024-06-14 11:56:55,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521419677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:55,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:55,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:55,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128659022] [2024-06-14 11:56:55,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:55,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:55,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:55,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:55,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:56:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 732 transitions, 13316 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:56:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:57,793 INFO L124 PetriNetUnfolderBase]: 5858/8838 cut-off events. [2024-06-14 11:56:57,793 INFO L125 PetriNetUnfolderBase]: For 1384965/1384965 co-relation queries the response was YES. [2024-06-14 11:56:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93551 conditions, 8838 events. 5858/8838 cut-off events. For 1384965/1384965 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 50964 event pairs, 2183 based on Foata normal form. 2/8838 useless extension candidates. Maximal degree in co-relation 93356. Up to 8699 conditions per place. [2024-06-14 11:56:57,961 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 708 selfloop transitions, 41 changer transitions 0/752 dead transitions. [2024-06-14 11:56:57,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 752 transitions, 15100 flow [2024-06-14 11:56:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 11:56:57,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 11:56:57,962 INFO L175 Difference]: Start difference. First operand has 405 places, 732 transitions, 13316 flow. Second operand 8 states and 134 transitions. [2024-06-14 11:56:57,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 752 transitions, 15100 flow [2024-06-14 11:57:02,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 752 transitions, 14978 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:02,105 INFO L231 Difference]: Finished difference. Result has 406 places, 735 transitions, 13324 flow [2024-06-14 11:57:02,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13194, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13324, PETRI_PLACES=406, PETRI_TRANSITIONS=735} [2024-06-14 11:57:02,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 11:57:02,106 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 735 transitions, 13324 flow [2024-06-14 11:57:02,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:02,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:57:02,106 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:02,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1953128890, now seen corresponding path program 4 times [2024-06-14 11:57:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604134014] [2024-06-14 11:57:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:02,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:02,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:02,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604134014] [2024-06-14 11:57:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604134014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293773891] [2024-06-14 11:57:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:02,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:02,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 735 transitions, 13324 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:02,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:02,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:02,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:05,504 INFO L124 PetriNetUnfolderBase]: 5873/8860 cut-off events. [2024-06-14 11:57:05,504 INFO L125 PetriNetUnfolderBase]: For 1416521/1416524 co-relation queries the response was YES. [2024-06-14 11:57:05,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93929 conditions, 8860 events. 5873/8860 cut-off events. For 1416521/1416524 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 51130 event pairs, 2190 based on Foata normal form. 3/8860 useless extension candidates. Maximal degree in co-relation 93733. Up to 8663 conditions per place. [2024-06-14 11:57:05,672 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 691 selfloop transitions, 61 changer transitions 0/755 dead transitions. [2024-06-14 11:57:05,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 755 transitions, 15157 flow [2024-06-14 11:57:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 11:57:05,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 11:57:05,673 INFO L175 Difference]: Start difference. First operand has 406 places, 735 transitions, 13324 flow. Second operand 8 states and 134 transitions. [2024-06-14 11:57:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 755 transitions, 15157 flow [2024-06-14 11:57:09,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 755 transitions, 15067 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:09,413 INFO L231 Difference]: Finished difference. Result has 409 places, 738 transitions, 13405 flow [2024-06-14 11:57:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13234, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13405, PETRI_PLACES=409, PETRI_TRANSITIONS=738} [2024-06-14 11:57:09,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 11:57:09,413 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 738 transitions, 13405 flow [2024-06-14 11:57:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:09,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:09,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:57:09,414 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 295489910, now seen corresponding path program 5 times [2024-06-14 11:57:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26856858] [2024-06-14 11:57:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:10,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26856858] [2024-06-14 11:57:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26856858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:10,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:10,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:10,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317816185] [2024-06-14 11:57:10,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:10,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:10,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 738 transitions, 13405 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:10,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:10,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:10,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:12,830 INFO L124 PetriNetUnfolderBase]: 5888/8881 cut-off events. [2024-06-14 11:57:12,831 INFO L125 PetriNetUnfolderBase]: For 1444364/1444367 co-relation queries the response was YES. [2024-06-14 11:57:12,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94406 conditions, 8881 events. 5888/8881 cut-off events. For 1444364/1444367 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51237 event pairs, 2192 based on Foata normal form. 3/8881 useless extension candidates. Maximal degree in co-relation 94209. Up to 8677 conditions per place. [2024-06-14 11:57:12,993 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 700 selfloop transitions, 61 changer transitions 0/764 dead transitions. [2024-06-14 11:57:12,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 764 transitions, 15332 flow [2024-06-14 11:57:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 11:57:12,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 11:57:12,994 INFO L175 Difference]: Start difference. First operand has 409 places, 738 transitions, 13405 flow. Second operand 8 states and 138 transitions. [2024-06-14 11:57:12,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 764 transitions, 15332 flow [2024-06-14 11:57:16,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 764 transitions, 15211 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:16,719 INFO L231 Difference]: Finished difference. Result has 412 places, 741 transitions, 13461 flow [2024-06-14 11:57:16,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13293, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13461, PETRI_PLACES=412, PETRI_TRANSITIONS=741} [2024-06-14 11:57:16,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 11:57:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 741 transitions, 13461 flow [2024-06-14 11:57:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:16,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:57:16,721 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1643316240, now seen corresponding path program 4 times [2024-06-14 11:57:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:16,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018757373] [2024-06-14 11:57:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:17,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018757373] [2024-06-14 11:57:17,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018757373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:17,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:17,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638441370] [2024-06-14 11:57:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:17,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:17,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:17,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:17,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 741 transitions, 13461 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:17,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:17,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:20,112 INFO L124 PetriNetUnfolderBase]: 5882/8873 cut-off events. [2024-06-14 11:57:20,112 INFO L125 PetriNetUnfolderBase]: For 1457677/1457680 co-relation queries the response was YES. [2024-06-14 11:57:20,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94377 conditions, 8873 events. 5882/8873 cut-off events. For 1457677/1457680 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 51222 event pairs, 2201 based on Foata normal form. 2/8872 useless extension candidates. Maximal degree in co-relation 94179. Up to 8736 conditions per place. [2024-06-14 11:57:20,274 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 709 selfloop transitions, 41 changer transitions 0/753 dead transitions. [2024-06-14 11:57:20,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 753 transitions, 14999 flow [2024-06-14 11:57:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 11:57:20,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 11:57:20,275 INFO L175 Difference]: Start difference. First operand has 412 places, 741 transitions, 13461 flow. Second operand 8 states and 130 transitions. [2024-06-14 11:57:20,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 753 transitions, 14999 flow [2024-06-14 11:57:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 753 transitions, 14799 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:24,790 INFO L231 Difference]: Finished difference. Result has 413 places, 741 transitions, 13349 flow [2024-06-14 11:57:24,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13261, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13349, PETRI_PLACES=413, PETRI_TRANSITIONS=741} [2024-06-14 11:57:24,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 11:57:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 741 transitions, 13349 flow [2024-06-14 11:57:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:57:24,791 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:24,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 295483400, now seen corresponding path program 6 times [2024-06-14 11:57:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251714719] [2024-06-14 11:57:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251714719] [2024-06-14 11:57:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251714719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691242667] [2024-06-14 11:57:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:25,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:25,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 741 transitions, 13349 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:25,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:25,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:25,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:28,173 INFO L124 PetriNetUnfolderBase]: 5873/8861 cut-off events. [2024-06-14 11:57:28,173 INFO L125 PetriNetUnfolderBase]: For 1474498/1474501 co-relation queries the response was YES. [2024-06-14 11:57:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94155 conditions, 8861 events. 5873/8861 cut-off events. For 1474498/1474501 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 51097 event pairs, 2189 based on Foata normal form. 3/8861 useless extension candidates. Maximal degree in co-relation 93956. Up to 8662 conditions per place. [2024-06-14 11:57:28,330 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 692 selfloop transitions, 64 changer transitions 0/759 dead transitions. [2024-06-14 11:57:28,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 759 transitions, 14985 flow [2024-06-14 11:57:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 11:57:28,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:57:28,332 INFO L175 Difference]: Start difference. First operand has 413 places, 741 transitions, 13349 flow. Second operand 8 states and 136 transitions. [2024-06-14 11:57:28,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 759 transitions, 14985 flow [2024-06-14 11:57:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 759 transitions, 14839 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:33,068 INFO L231 Difference]: Finished difference. Result has 413 places, 741 transitions, 13337 flow [2024-06-14 11:57:33,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13203, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13337, PETRI_PLACES=413, PETRI_TRANSITIONS=741} [2024-06-14 11:57:33,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 11:57:33,069 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 741 transitions, 13337 flow [2024-06-14 11:57:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:33,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:33,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:57:33,069 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:33,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 304071950, now seen corresponding path program 1 times [2024-06-14 11:57:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501825771] [2024-06-14 11:57:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501825771] [2024-06-14 11:57:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501825771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:34,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105797795] [2024-06-14 11:57:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:34,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:34,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:57:34,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 741 transitions, 13337 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:34,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:34,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:57:34,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:36,593 INFO L124 PetriNetUnfolderBase]: 5698/8661 cut-off events. [2024-06-14 11:57:36,594 INFO L125 PetriNetUnfolderBase]: For 1514418/1514483 co-relation queries the response was YES. [2024-06-14 11:57:36,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91931 conditions, 8661 events. 5698/8661 cut-off events. For 1514418/1514483 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 50852 event pairs, 2105 based on Foata normal form. 57/8676 useless extension candidates. Maximal degree in co-relation 91731. Up to 8169 conditions per place. [2024-06-14 11:57:36,759 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 620 selfloop transitions, 18 changer transitions 0/755 dead transitions. [2024-06-14 11:57:36,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 755 transitions, 14720 flow [2024-06-14 11:57:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:57:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:57:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 11:57:36,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 11:57:36,761 INFO L175 Difference]: Start difference. First operand has 413 places, 741 transitions, 13337 flow. Second operand 8 states and 129 transitions. [2024-06-14 11:57:36,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 755 transitions, 14720 flow [2024-06-14 11:57:40,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 755 transitions, 14550 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:57:40,615 INFO L231 Difference]: Finished difference. Result has 413 places, 743 transitions, 13282 flow [2024-06-14 11:57:40,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13167, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13282, PETRI_PLACES=413, PETRI_TRANSITIONS=743} [2024-06-14 11:57:40,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 11:57:40,616 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 743 transitions, 13282 flow [2024-06-14 11:57:40,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:57:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:57:40,617 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:40,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 714689788, now seen corresponding path program 1 times [2024-06-14 11:57:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075413859] [2024-06-14 11:57:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:41,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:41,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075413859] [2024-06-14 11:57:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075413859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:41,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:41,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:41,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199952430] [2024-06-14 11:57:41,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:41,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:41,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:41,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:41,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 743 transitions, 13282 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:57:41,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:41,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:41,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:43,636 INFO L124 PetriNetUnfolderBase]: 5926/8937 cut-off events. [2024-06-14 11:57:43,637 INFO L125 PetriNetUnfolderBase]: For 1535428/1535443 co-relation queries the response was YES. [2024-06-14 11:57:43,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95266 conditions, 8937 events. 5926/8937 cut-off events. For 1535428/1535443 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 51459 event pairs, 1149 based on Foata normal form. 14/8948 useless extension candidates. Maximal degree in co-relation 95065. Up to 8120 conditions per place. [2024-06-14 11:57:43,800 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 600 selfloop transitions, 182 changer transitions 0/785 dead transitions. [2024-06-14 11:57:43,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 785 transitions, 15570 flow [2024-06-14 11:57:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:57:43,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 11:57:43,801 INFO L175 Difference]: Start difference. First operand has 413 places, 743 transitions, 13282 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:57:43,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 785 transitions, 15570 flow [2024-06-14 11:57:48,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 785 transitions, 15471 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:48,075 INFO L231 Difference]: Finished difference. Result has 418 places, 753 transitions, 13812 flow [2024-06-14 11:57:48,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13183, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13812, PETRI_PLACES=418, PETRI_TRANSITIONS=753} [2024-06-14 11:57:48,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 11:57:48,076 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 753 transitions, 13812 flow [2024-06-14 11:57:48,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:57:48,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:48,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:48,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:57:48,076 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:48,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 869243190, now seen corresponding path program 2 times [2024-06-14 11:57:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:48,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574018295] [2024-06-14 11:57:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:48,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574018295] [2024-06-14 11:57:48,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574018295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:48,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636514224] [2024-06-14 11:57:48,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:48,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:48,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 753 transitions, 13812 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:57:48,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:48,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:51,389 INFO L124 PetriNetUnfolderBase]: 6016/9077 cut-off events. [2024-06-14 11:57:51,389 INFO L125 PetriNetUnfolderBase]: For 1595437/1595452 co-relation queries the response was YES. [2024-06-14 11:57:51,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98280 conditions, 9077 events. 6016/9077 cut-off events. For 1595437/1595452 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 52716 event pairs, 1360 based on Foata normal form. 14/9088 useless extension candidates. Maximal degree in co-relation 98076. Up to 8338 conditions per place. [2024-06-14 11:57:51,562 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 608 selfloop transitions, 187 changer transitions 0/798 dead transitions. [2024-06-14 11:57:51,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 798 transitions, 16255 flow [2024-06-14 11:57:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 11:57:51,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 11:57:51,564 INFO L175 Difference]: Start difference. First operand has 418 places, 753 transitions, 13812 flow. Second operand 9 states and 170 transitions. [2024-06-14 11:57:51,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 798 transitions, 16255 flow [2024-06-14 11:57:56,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 798 transitions, 15704 flow, removed 161 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:56,945 INFO L231 Difference]: Finished difference. Result has 423 places, 766 transitions, 14019 flow [2024-06-14 11:57:56,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13431, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14019, PETRI_PLACES=423, PETRI_TRANSITIONS=766} [2024-06-14 11:57:56,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 11:57:56,946 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 766 transitions, 14019 flow [2024-06-14 11:57:56,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:57:56,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:56,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:56,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:57:56,946 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:56,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 886146870, now seen corresponding path program 3 times [2024-06-14 11:57:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:56,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037589579] [2024-06-14 11:57:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:56,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037589579] [2024-06-14 11:57:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037589579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:57:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026998986] [2024-06-14 11:57:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:57:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:57:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:57:57,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:57:57,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 766 transitions, 14019 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:57:57,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:57,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:57:57,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:00,596 INFO L124 PetriNetUnfolderBase]: 6006/9063 cut-off events. [2024-06-14 11:58:00,596 INFO L125 PetriNetUnfolderBase]: For 1596295/1596312 co-relation queries the response was YES. [2024-06-14 11:58:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97864 conditions, 9063 events. 6006/9063 cut-off events. For 1596295/1596312 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 52591 event pairs, 1353 based on Foata normal form. 16/9076 useless extension candidates. Maximal degree in co-relation 97658. Up to 8399 conditions per place. [2024-06-14 11:58:00,732 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 607 selfloop transitions, 182 changer transitions 0/792 dead transitions. [2024-06-14 11:58:00,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 792 transitions, 15891 flow [2024-06-14 11:58:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 11:58:00,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 11:58:00,734 INFO L175 Difference]: Start difference. First operand has 423 places, 766 transitions, 14019 flow. Second operand 9 states and 164 transitions. [2024-06-14 11:58:00,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 792 transitions, 15891 flow [2024-06-14 11:58:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 792 transitions, 15589 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:05,048 INFO L231 Difference]: Finished difference. Result has 427 places, 766 transitions, 14090 flow [2024-06-14 11:58:05,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13717, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14090, PETRI_PLACES=427, PETRI_TRANSITIONS=766} [2024-06-14 11:58:05,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 11:58:05,048 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 766 transitions, 14090 flow [2024-06-14 11:58:05,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-14 11:58:05,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:05,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:58:05,049 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:05,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash -406285073, now seen corresponding path program 4 times [2024-06-14 11:58:05,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417926946] [2024-06-14 11:58:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417926946] [2024-06-14 11:58:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417926946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:06,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446248398] [2024-06-14 11:58:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:06,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:06,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:06,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:06,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:58:06,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 766 transitions, 14090 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:06,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:06,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:58:06,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:08,868 INFO L124 PetriNetUnfolderBase]: 6026/9093 cut-off events. [2024-06-14 11:58:08,868 INFO L125 PetriNetUnfolderBase]: For 1614727/1614734 co-relation queries the response was YES. [2024-06-14 11:58:08,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98689 conditions, 9093 events. 6026/9093 cut-off events. For 1614727/1614734 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 52779 event pairs, 1512 based on Foata normal form. 8/9098 useless extension candidates. Maximal degree in co-relation 98481. Up to 8377 conditions per place. [2024-06-14 11:58:09,043 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 576 selfloop transitions, 228 changer transitions 0/807 dead transitions. [2024-06-14 11:58:09,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 807 transitions, 16165 flow [2024-06-14 11:58:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:58:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:58:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-14 11:58:09,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2024-06-14 11:58:09,045 INFO L175 Difference]: Start difference. First operand has 427 places, 766 transitions, 14090 flow. Second operand 11 states and 195 transitions. [2024-06-14 11:58:09,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 807 transitions, 16165 flow [2024-06-14 11:58:14,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 807 transitions, 15802 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:14,436 INFO L231 Difference]: Finished difference. Result has 431 places, 774 transitions, 14355 flow [2024-06-14 11:58:14,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13727, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14355, PETRI_PLACES=431, PETRI_TRANSITIONS=774} [2024-06-14 11:58:14,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 11:58:14,437 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 774 transitions, 14355 flow [2024-06-14 11:58:14,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:14,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:14,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:14,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:58:14,438 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:14,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 759921074, now seen corresponding path program 1 times [2024-06-14 11:58:14,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:14,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192840328] [2024-06-14 11:58:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:14,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:15,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:15,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192840328] [2024-06-14 11:58:15,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192840328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:15,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:15,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874276008] [2024-06-14 11:58:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:15,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:15,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:15,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:58:15,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 774 transitions, 14355 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:15,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:15,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:58:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:18,496 INFO L124 PetriNetUnfolderBase]: 6068/9155 cut-off events. [2024-06-14 11:58:18,496 INFO L125 PetriNetUnfolderBase]: For 1668745/1668758 co-relation queries the response was YES. [2024-06-14 11:58:18,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100356 conditions, 9155 events. 6068/9155 cut-off events. For 1668745/1668758 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 53225 event pairs, 1544 based on Foata normal form. 10/9162 useless extension candidates. Maximal degree in co-relation 100147. Up to 8450 conditions per place. [2024-06-14 11:58:18,661 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 684 selfloop transitions, 145 changer transitions 0/832 dead transitions. [2024-06-14 11:58:18,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 832 transitions, 17285 flow [2024-06-14 11:58:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:58:18,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:58:18,662 INFO L175 Difference]: Start difference. First operand has 431 places, 774 transitions, 14355 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:58:18,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 832 transitions, 17285 flow [2024-06-14 11:58:22,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 832 transitions, 16928 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:22,565 INFO L231 Difference]: Finished difference. Result has 436 places, 797 transitions, 14855 flow [2024-06-14 11:58:22,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13998, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14855, PETRI_PLACES=436, PETRI_TRANSITIONS=797} [2024-06-14 11:58:22,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-14 11:58:22,566 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 797 transitions, 14855 flow [2024-06-14 11:58:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:22,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:58:22,566 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:22,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1378775507, now seen corresponding path program 2 times [2024-06-14 11:58:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613543920] [2024-06-14 11:58:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:23,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613543920] [2024-06-14 11:58:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613543920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:23,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:23,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:23,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681348959] [2024-06-14 11:58:23,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:23,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:23,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:23,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:58:23,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 797 transitions, 14855 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:23,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:23,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:58:23,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:26,694 INFO L124 PetriNetUnfolderBase]: 6098/9196 cut-off events. [2024-06-14 11:58:26,694 INFO L125 PetriNetUnfolderBase]: For 1729346/1729359 co-relation queries the response was YES. [2024-06-14 11:58:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101982 conditions, 9196 events. 6098/9196 cut-off events. For 1729346/1729359 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 53417 event pairs, 1532 based on Foata normal form. 16/9209 useless extension candidates. Maximal degree in co-relation 101769. Up to 8392 conditions per place. [2024-06-14 11:58:26,850 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 644 selfloop transitions, 190 changer transitions 0/837 dead transitions. [2024-06-14 11:58:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 837 transitions, 17509 flow [2024-06-14 11:58:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:58:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:58:26,852 INFO L175 Difference]: Start difference. First operand has 436 places, 797 transitions, 14855 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:58:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 837 transitions, 17509 flow [2024-06-14 11:58:31,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 837 transitions, 17269 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-14 11:58:31,622 INFO L231 Difference]: Finished difference. Result has 442 places, 804 transitions, 15209 flow [2024-06-14 11:58:31,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14615, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15209, PETRI_PLACES=442, PETRI_TRANSITIONS=804} [2024-06-14 11:58:31,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 11:58:31,623 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 804 transitions, 15209 flow [2024-06-14 11:58:31,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:31,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:31,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:31,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:58:31,623 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:31,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1378775724, now seen corresponding path program 2 times [2024-06-14 11:58:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:31,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189660405] [2024-06-14 11:58:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:31,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:32,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189660405] [2024-06-14 11:58:32,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189660405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:32,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:32,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:32,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151686207] [2024-06-14 11:58:32,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:32,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:32,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:32,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:58:32,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 804 transitions, 15209 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:32,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:32,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:58:32,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:35,717 INFO L124 PetriNetUnfolderBase]: 6108/9211 cut-off events. [2024-06-14 11:58:35,717 INFO L125 PetriNetUnfolderBase]: For 1736441/1736454 co-relation queries the response was YES. [2024-06-14 11:58:35,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101909 conditions, 9211 events. 6108/9211 cut-off events. For 1736441/1736454 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 53535 event pairs, 1547 based on Foata normal form. 10/9218 useless extension candidates. Maximal degree in co-relation 101694. Up to 8502 conditions per place. [2024-06-14 11:58:35,894 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 690 selfloop transitions, 147 changer transitions 0/840 dead transitions. [2024-06-14 11:58:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 840 transitions, 17803 flow [2024-06-14 11:58:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 11:58:35,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 11:58:35,896 INFO L175 Difference]: Start difference. First operand has 442 places, 804 transitions, 15209 flow. Second operand 9 states and 166 transitions. [2024-06-14 11:58:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 840 transitions, 17803 flow [2024-06-14 11:58:40,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 840 transitions, 17479 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:40,584 INFO L231 Difference]: Finished difference. Result has 445 places, 808 transitions, 15248 flow [2024-06-14 11:58:40,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14885, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15248, PETRI_PLACES=445, PETRI_TRANSITIONS=808} [2024-06-14 11:58:40,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-14 11:58:40,585 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 808 transitions, 15248 flow [2024-06-14 11:58:40,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:40,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:40,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:58:40,586 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:40,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 473145272, now seen corresponding path program 1 times [2024-06-14 11:58:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:40,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333847171] [2024-06-14 11:58:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:42,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:42,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333847171] [2024-06-14 11:58:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333847171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:42,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-14 11:58:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546441028] [2024-06-14 11:58:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 11:58:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 11:58:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-14 11:58:42,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:58:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 808 transitions, 15248 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:58:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:46,283 INFO L124 PetriNetUnfolderBase]: 6243/9507 cut-off events. [2024-06-14 11:58:46,284 INFO L125 PetriNetUnfolderBase]: For 1863266/1863287 co-relation queries the response was YES. [2024-06-14 11:58:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104964 conditions, 9507 events. 6243/9507 cut-off events. For 1863266/1863287 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 56794 event pairs, 1393 based on Foata normal form. 20/9489 useless extension candidates. Maximal degree in co-relation 104748. Up to 7943 conditions per place. [2024-06-14 11:58:46,469 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 674 selfloop transitions, 163 changer transitions 0/899 dead transitions. [2024-06-14 11:58:46,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 899 transitions, 17565 flow [2024-06-14 11:58:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:58:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:58:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 283 transitions. [2024-06-14 11:58:46,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387596899224806 [2024-06-14 11:58:46,470 INFO L175 Difference]: Start difference. First operand has 445 places, 808 transitions, 15248 flow. Second operand 15 states and 283 transitions. [2024-06-14 11:58:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 899 transitions, 17565 flow [2024-06-14 11:58:50,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 899 transitions, 17312 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:58:50,627 INFO L231 Difference]: Finished difference. Result has 458 places, 823 transitions, 15647 flow [2024-06-14 11:58:50,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14998, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15647, PETRI_PLACES=458, PETRI_TRANSITIONS=823} [2024-06-14 11:58:50,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 11:58:50,627 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 823 transitions, 15647 flow [2024-06-14 11:58:50,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:58:50,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:50,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:50,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:58:50,628 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:50,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1183641292, now seen corresponding path program 1 times [2024-06-14 11:58:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:50,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720825931] [2024-06-14 11:58:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720825931] [2024-06-14 11:58:51,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720825931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:51,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:51,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744664519] [2024-06-14 11:58:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:51,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:58:51,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 823 transitions, 15647 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 11:58:51,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:51,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:58:51,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:55,006 INFO L124 PetriNetUnfolderBase]: 6419/9706 cut-off events. [2024-06-14 11:58:55,006 INFO L125 PetriNetUnfolderBase]: For 1847741/1847757 co-relation queries the response was YES. [2024-06-14 11:58:55,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106933 conditions, 9706 events. 6419/9706 cut-off events. For 1847741/1847757 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 57384 event pairs, 1392 based on Foata normal form. 16/9719 useless extension candidates. Maximal degree in co-relation 106713. Up to 8603 conditions per place. [2024-06-14 11:58:55,205 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 623 selfloop transitions, 248 changer transitions 0/874 dead transitions. [2024-06-14 11:58:55,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 874 transitions, 18481 flow [2024-06-14 11:58:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:58:55,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 11:58:55,207 INFO L175 Difference]: Start difference. First operand has 458 places, 823 transitions, 15647 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:58:55,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 874 transitions, 18481 flow [2024-06-14 11:59:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 874 transitions, 18250 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 11:59:00,573 INFO L231 Difference]: Finished difference. Result has 460 places, 840 transitions, 16378 flow [2024-06-14 11:59:00,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15422, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16378, PETRI_PLACES=460, PETRI_TRANSITIONS=840} [2024-06-14 11:59:00,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-14 11:59:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 840 transitions, 16378 flow [2024-06-14 11:59:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 11:59:00,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:00,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:59:00,575 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:00,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1929391465, now seen corresponding path program 3 times [2024-06-14 11:59:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:00,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055118436] [2024-06-14 11:59:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:00,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:01,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:01,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055118436] [2024-06-14 11:59:01,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055118436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:01,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:01,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886502242] [2024-06-14 11:59:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:59:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 840 transitions, 16378 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:59:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:04,866 INFO L124 PetriNetUnfolderBase]: 6395/9679 cut-off events. [2024-06-14 11:59:04,867 INFO L125 PetriNetUnfolderBase]: For 1858087/1858100 co-relation queries the response was YES. [2024-06-14 11:59:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106558 conditions, 9679 events. 6395/9679 cut-off events. For 1858087/1858100 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 57195 event pairs, 1577 based on Foata normal form. 18/9694 useless extension candidates. Maximal degree in co-relation 106336. Up to 8885 conditions per place. [2024-06-14 11:59:05,038 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 671 selfloop transitions, 193 changer transitions 0/867 dead transitions. [2024-06-14 11:59:05,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 867 transitions, 18662 flow [2024-06-14 11:59:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 11:59:05,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 11:59:05,039 INFO L175 Difference]: Start difference. First operand has 460 places, 840 transitions, 16378 flow. Second operand 9 states and 163 transitions. [2024-06-14 11:59:05,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 867 transitions, 18662 flow [2024-06-14 11:59:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 867 transitions, 18417 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-14 11:59:10,194 INFO L231 Difference]: Finished difference. Result has 466 places, 840 transitions, 16542 flow [2024-06-14 11:59:10,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16133, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16542, PETRI_PLACES=466, PETRI_TRANSITIONS=840} [2024-06-14 11:59:10,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 11:59:10,195 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 840 transitions, 16542 flow [2024-06-14 11:59:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:10,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:10,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:10,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:59:10,195 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:10,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1378481006, now seen corresponding path program 3 times [2024-06-14 11:59:10,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:10,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517527437] [2024-06-14 11:59:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:11,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517527437] [2024-06-14 11:59:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517527437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:11,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:11,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:11,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70044748] [2024-06-14 11:59:11,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:11,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:11,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:59:11,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 840 transitions, 16542 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:59:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:14,625 INFO L124 PetriNetUnfolderBase]: 6389/9672 cut-off events. [2024-06-14 11:59:14,625 INFO L125 PetriNetUnfolderBase]: For 1842901/1842914 co-relation queries the response was YES. [2024-06-14 11:59:14,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106854 conditions, 9672 events. 6389/9672 cut-off events. For 1842901/1842914 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 57189 event pairs, 1629 based on Foata normal form. 10/9679 useless extension candidates. Maximal degree in co-relation 106630. Up to 8960 conditions per place. [2024-06-14 11:59:14,786 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 711 selfloop transitions, 155 changer transitions 0/869 dead transitions. [2024-06-14 11:59:14,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 869 transitions, 18939 flow [2024-06-14 11:59:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 11:59:14,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 11:59:14,788 INFO L175 Difference]: Start difference. First operand has 466 places, 840 transitions, 16542 flow. Second operand 9 states and 160 transitions. [2024-06-14 11:59:14,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 869 transitions, 18939 flow [2024-06-14 11:59:20,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 869 transitions, 18580 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:20,331 INFO L231 Difference]: Finished difference. Result has 469 places, 842 transitions, 16581 flow [2024-06-14 11:59:20,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16183, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16581, PETRI_PLACES=469, PETRI_TRANSITIONS=842} [2024-06-14 11:59:20,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-14 11:59:20,332 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 842 transitions, 16581 flow [2024-06-14 11:59:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:20,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:20,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:59:20,332 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:20,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1998128618, now seen corresponding path program 4 times [2024-06-14 11:59:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508895629] [2024-06-14 11:59:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:59:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508895629] [2024-06-14 11:59:21,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508895629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:21,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:21,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210648955] [2024-06-14 11:59:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:21,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:21,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:59:21,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 842 transitions, 16581 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:59:21,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:21,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:59:21,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand