./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_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/mix052_power.oepc_power.opt_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/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix052_power.oepc_power.opt_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 12:35:53,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:35:53,980 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:35:53,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:35:53,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:35:54,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:35:54,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:35:54,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:35:54,011 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:35:54,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:35:54,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:35:54,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:35:54,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:35:54,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:35:54,018 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:35:54,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:35:54,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:35:54,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:35:54,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:35:54,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:35:54,020 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:35:54,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:35:54,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:35:54,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:35:54,021 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:35:54,022 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:35:54,022 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:35:54,022 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:35:54,022 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:35:54,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:35:54,024 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:35:54,024 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:35:54,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:54,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:35:54,025 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:35:54,025 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:35:54,025 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:35:54,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:35:54,026 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:35:54,026 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:35:54,026 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:35:54,026 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:35:54,026 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:35:54,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:35:54,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:35:54,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:35:54,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:35:54,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:35:54,314 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:35:54,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:55,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:35:55,769 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:35:55,774 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:55,797 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32697d384/057a92878853419180abf4068ed41920/FLAGc4b87697c [2024-06-14 12:35:55,810 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32697d384/057a92878853419180abf4068ed41920 [2024-06-14 12:35:55,813 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:35:55,814 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:35:55,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:35:55,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:35:55,966 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:35:55,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:55,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:35:55,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:35:55,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:55" (1/2) ... [2024-06-14 12:35:55,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d56c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:55, skipping insertion in model container [2024-06-14 12:35:55,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:55" (1/2) ... [2024-06-14 12:35:55,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f6e8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:55, skipping insertion in model container [2024-06-14 12:35:55,980 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:55" (2/2) ... [2024-06-14 12:35:55,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d56c74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:55, skipping insertion in model container [2024-06-14 12:35:55,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:55" (2/2) ... [2024-06-14 12:35:55,981 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:35:56,089 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:35:56,091 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:35:56,092 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:35:56,092 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:35:56,092 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:35:56,093 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-14 12:35:56,140 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:35:56,610 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:56,620 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:35:56,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:56,815 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:35:56,815 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56 WrapperNode [2024-06-14 12:35:56,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:56,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:56,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:35:56,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:35:56,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,866 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-14 12:35:56,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:56,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:35:56,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:35:56,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:35:56,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,884 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,899 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 12:35:56,900 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,910 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,912 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:35:56,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:35:56,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:35:56,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:35:56,921 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (1/1) ... [2024-06-14 12:35:56,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:35:56,961 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 12:35:56,986 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 12:35:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:35:57,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:35:57,006 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:35:57,006 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:35:57,006 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:35:57,006 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:35:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:35:57,007 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:35:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:35:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:35:57,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:35:57,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:35:57,009 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 12:35:57,166 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:35:57,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:35:57,575 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:35:57,576 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:35:57,735 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:35:57,735 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:35:57,736 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:57 BoogieIcfgContainer [2024-06-14 12:35:57,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:35:57,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:35:57,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:35:57,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:35:57,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:35:55" (1/4) ... [2024-06-14 12:35:57,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f75e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:57, skipping insertion in model container [2024-06-14 12:35:57,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:55" (2/4) ... [2024-06-14 12:35:57,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f75e30a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:57, skipping insertion in model container [2024-06-14 12:35:57,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:56" (3/4) ... [2024-06-14 12:35:57,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f75e30a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:57, skipping insertion in model container [2024-06-14 12:35:57,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:57" (4/4) ... [2024-06-14 12:35:57,746 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:57,762 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:35:57,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:35:57,763 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:35:57,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:35:57,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:35:57,885 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:35:57,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:35:57,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:35:57,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:35:57,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:35:57,913 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;@9804024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:35:57,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:35:57,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:35:57,921 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:35:57,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:57,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:57,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:35:57,923 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 12:35:57,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1534033092, now seen corresponding path program 1 times [2024-06-14 12:35:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439715971] [2024-06-14 12:35:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:59,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:59,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439715971] [2024-06-14 12:35:59,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439715971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:59,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:59,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:35:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809856668] [2024-06-14 12:35:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:35:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:35:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:35:59,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:35:59,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:59,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:59,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:35:59,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:59,567 INFO L124 PetriNetUnfolderBase]: 1363/2075 cut-off events. [2024-06-14 12:35:59,567 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 12:35:59,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4201 conditions, 2075 events. 1363/2075 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9692 event pairs, 964 based on Foata normal form. 1/2036 useless extension candidates. Maximal degree in co-relation 4186. Up to 2037 conditions per place. [2024-06-14 12:35:59,588 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 12:35:59,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 175 flow [2024-06-14 12:35:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:35:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:35:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 12:35:59,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 12:35:59,603 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-14 12:35:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 175 flow [2024-06-14 12:35:59,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:59,610 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:35:59,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:35:59,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:35:59,616 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:35:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:59,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:59,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:35:59,617 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 12:35:59,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1031985189, now seen corresponding path program 1 times [2024-06-14 12:35:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:59,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558544786] [2024-06-14 12:35:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:59,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:00,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558544786] [2024-06-14 12:36:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558544786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:00,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:36:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390468706] [2024-06-14 12:36:00,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:00,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:36:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:36:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:36:00,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:36:00,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:00,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:00,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:36:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:00,697 INFO L124 PetriNetUnfolderBase]: 1357/2071 cut-off events. [2024-06-14 12:36:00,697 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-14 12:36:00,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2071 events. 1357/2071 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9656 event pairs, 840 based on Foata normal form. 3/2073 useless extension candidates. Maximal degree in co-relation 4725. Up to 2013 conditions per place. [2024-06-14 12:36:00,712 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-14 12:36:00,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 242 flow [2024-06-14 12:36:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:36:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:36:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-14 12:36:00,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 12:36:00,716 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 91 transitions. [2024-06-14 12:36:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 242 flow [2024-06-14 12:36:00,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:36:00,719 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 12:36:00,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 12:36:00,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 12:36:00,720 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 12:36:00,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:00,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:00,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:36:00,724 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 12:36:00,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1926768673, now seen corresponding path program 1 times [2024-06-14 12:36:00,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:00,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148609013] [2024-06-14 12:36:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:01,443 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 12:36:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148609013] [2024-06-14 12:36:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148609013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:01,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:01,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:36:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716486484] [2024-06-14 12:36:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:01,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:36:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:36:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:36:01,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:36:01,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:36:01,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:01,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:36:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:01,917 INFO L124 PetriNetUnfolderBase]: 1411/2147 cut-off events. [2024-06-14 12:36:01,917 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-14 12:36:01,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2147 events. 1411/2147 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10031 event pairs, 629 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 5460. Up to 1982 conditions per place. [2024-06-14 12:36:01,932 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 56 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 12:36:01,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 404 flow [2024-06-14 12:36:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:36:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:36:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 12:36:01,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 12:36:01,934 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 121 transitions. [2024-06-14 12:36:01,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 404 flow [2024-06-14 12:36:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:01,938 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 237 flow [2024-06-14 12:36:01,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-14 12:36:01,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 12:36:01,939 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 237 flow [2024-06-14 12:36:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:36:01,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:01,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:01,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:36:01,940 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 12:36:01,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1286294586, now seen corresponding path program 1 times [2024-06-14 12:36:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058892020] [2024-06-14 12:36:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:02,954 INFO 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 12:36:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058892020] [2024-06-14 12:36:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058892020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:02,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:02,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:36:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647061921] [2024-06-14 12:36:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:36:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:36:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:36:03,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:36:03,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:03,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:03,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:36:03,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:03,466 INFO L124 PetriNetUnfolderBase]: 1433/2180 cut-off events. [2024-06-14 12:36:03,466 INFO L125 PetriNetUnfolderBase]: For 2840/2840 co-relation queries the response was YES. [2024-06-14 12:36:03,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6747 conditions, 2180 events. 1433/2180 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10247 event pairs, 503 based on Foata normal form. 7/2185 useless extension candidates. Maximal degree in co-relation 6727. Up to 1971 conditions per place. [2024-06-14 12:36:03,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 64 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-14 12:36:03,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 543 flow [2024-06-14 12:36:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 12:36:03,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 12:36:03,485 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 237 flow. Second operand 6 states and 143 transitions. [2024-06-14 12:36:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 543 flow [2024-06-14 12:36:03,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 535 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:36:03,490 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 310 flow [2024-06-14 12:36:03,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-14 12:36:03,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-14 12:36:03,492 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 310 flow [2024-06-14 12:36:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:03,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:03,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:03,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:36:03,492 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 12:36:03,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1220427678, now seen corresponding path program 1 times [2024-06-14 12:36:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630181391] [2024-06-14 12:36:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630181391] [2024-06-14 12:36:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630181391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:04,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:04,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111181928] [2024-06-14 12:36:04,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:04,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:04,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:36:04,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:04,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:36:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:05,221 INFO L124 PetriNetUnfolderBase]: 1529/2348 cut-off events. [2024-06-14 12:36:05,221 INFO L125 PetriNetUnfolderBase]: For 4840/4840 co-relation queries the response was YES. [2024-06-14 12:36:05,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8075 conditions, 2348 events. 1529/2348 cut-off events. For 4840/4840 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11492 event pairs, 348 based on Foata normal form. 28/2374 useless extension candidates. Maximal degree in co-relation 8052. Up to 1892 conditions per place. [2024-06-14 12:36:05,240 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 75 selfloop transitions, 33 changer transitions 0/112 dead transitions. [2024-06-14 12:36:05,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 112 transitions, 792 flow [2024-06-14 12:36:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 12:36:05,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 12:36:05,244 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 310 flow. Second operand 7 states and 168 transitions. [2024-06-14 12:36:05,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 112 transitions, 792 flow [2024-06-14 12:36:05,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 112 transitions, 743 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:05,257 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 497 flow [2024-06-14 12:36:05,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-14 12:36:05,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 12:36:05,260 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 497 flow [2024-06-14 12:36:05,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:36:05,262 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 12:36:05,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1106848670, now seen corresponding path program 1 times [2024-06-14 12:36:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179200470] [2024-06-14 12:36:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:05,929 INFO 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 12:36:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179200470] [2024-06-14 12:36:05,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179200470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:05,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:36:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042681034] [2024-06-14 12:36:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:05,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:36:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:36:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:36:06,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:06,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 497 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:06,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:06,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:06,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:06,541 INFO L124 PetriNetUnfolderBase]: 1519/2344 cut-off events. [2024-06-14 12:36:06,541 INFO L125 PetriNetUnfolderBase]: For 9124/9124 co-relation queries the response was YES. [2024-06-14 12:36:06,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 2344 events. 1519/2344 cut-off events. For 9124/9124 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11628 event pairs, 816 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 9386. Up to 2275 conditions per place. [2024-06-14 12:36:06,567 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 63 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-14 12:36:06,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 689 flow [2024-06-14 12:36:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:36:06,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:36:06,569 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 497 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:36:06,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 689 flow [2024-06-14 12:36:06,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 657 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 12:36:06,582 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 520 flow [2024-06-14 12:36:06,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 12:36:06,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 12:36:06,585 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 520 flow [2024-06-14 12:36:06,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:06,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:06,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:06,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:36:06,586 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 12:36:06,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:06,587 INFO L85 PathProgramCache]: Analyzing trace with hash -367296669, now seen corresponding path program 1 times [2024-06-14 12:36:06,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:06,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962078663] [2024-06-14 12:36:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962078663] [2024-06-14 12:36:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962078663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:07,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:07,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517984891] [2024-06-14 12:36:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:07,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:07,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:07,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:07,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:07,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:07,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:07,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:07,977 INFO L124 PetriNetUnfolderBase]: 1653/2545 cut-off events. [2024-06-14 12:36:07,977 INFO L125 PetriNetUnfolderBase]: For 10420/10438 co-relation queries the response was YES. [2024-06-14 12:36:07,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10457 conditions, 2545 events. 1653/2545 cut-off events. For 10420/10438 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12557 event pairs, 484 based on Foata normal form. 26/2569 useless extension candidates. Maximal degree in co-relation 10424. Up to 2306 conditions per place. [2024-06-14 12:36:08,003 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 84 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-14 12:36:08,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 1060 flow [2024-06-14 12:36:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:36:08,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-14 12:36:08,005 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 520 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:36:08,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 1060 flow [2024-06-14 12:36:08,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1027 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:08,021 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 770 flow [2024-06-14 12:36:08,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-14 12:36:08,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 12:36:08,022 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 770 flow [2024-06-14 12:36:08,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:08,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:08,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:36:08,023 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 12:36:08,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1847359781, now seen corresponding path program 2 times [2024-06-14 12:36:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:08,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830674025] [2024-06-14 12:36:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:08,802 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 12:36:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830674025] [2024-06-14 12:36:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830674025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320160601] [2024-06-14 12:36:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:08,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:08,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:08,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 770 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:08,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:08,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:08,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:09,420 INFO L124 PetriNetUnfolderBase]: 1673/2578 cut-off events. [2024-06-14 12:36:09,421 INFO L125 PetriNetUnfolderBase]: For 13096/13120 co-relation queries the response was YES. [2024-06-14 12:36:09,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11430 conditions, 2578 events. 1673/2578 cut-off events. For 13096/13120 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12765 event pairs, 495 based on Foata normal form. 36/2612 useless extension candidates. Maximal degree in co-relation 11395. Up to 2265 conditions per place. [2024-06-14 12:36:09,438 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 73 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-06-14 12:36:09,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 1184 flow [2024-06-14 12:36:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:36:09,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-14 12:36:09,440 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 770 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:36:09,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 1184 flow [2024-06-14 12:36:09,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1163 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:09,462 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 933 flow [2024-06-14 12:36:09,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2024-06-14 12:36:09,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-14 12:36:09,463 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 933 flow [2024-06-14 12:36:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:09,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:36:09,464 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 12:36:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1856763941, now seen corresponding path program 3 times [2024-06-14 12:36:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671705990] [2024-06-14 12:36:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671705990] [2024-06-14 12:36:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671705990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9198033] [2024-06-14 12:36:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:10,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:10,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 933 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:10,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:10,873 INFO L124 PetriNetUnfolderBase]: 1637/2526 cut-off events. [2024-06-14 12:36:10,873 INFO L125 PetriNetUnfolderBase]: For 15172/15172 co-relation queries the response was YES. [2024-06-14 12:36:10,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11536 conditions, 2526 events. 1637/2526 cut-off events. For 15172/15172 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12540 event pairs, 804 based on Foata normal form. 6/2529 useless extension candidates. Maximal degree in co-relation 11499. Up to 2427 conditions per place. [2024-06-14 12:36:10,894 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-14 12:36:10,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 1208 flow [2024-06-14 12:36:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:36:10,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:36:10,896 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 933 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:36:10,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 1208 flow [2024-06-14 12:36:10,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 1143 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:10,924 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 909 flow [2024-06-14 12:36:10,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-14 12:36:10,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 12:36:10,926 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 909 flow [2024-06-14 12:36:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:36:10,927 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 12:36:10,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1967673093, now seen corresponding path program 1 times [2024-06-14 12:36:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514122482] [2024-06-14 12:36:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:12,236 INFO 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 12:36:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514122482] [2024-06-14 12:36:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514122482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:12,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:12,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311925716] [2024-06-14 12:36:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:12,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:12,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 909 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:12,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:12,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:12,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:13,083 INFO L124 PetriNetUnfolderBase]: 2014/3049 cut-off events. [2024-06-14 12:36:13,084 INFO L125 PetriNetUnfolderBase]: For 17854/17854 co-relation queries the response was YES. [2024-06-14 12:36:13,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13530 conditions, 3049 events. 2014/3049 cut-off events. For 17854/17854 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14522 event pairs, 1010 based on Foata normal form. 4/3052 useless extension candidates. Maximal degree in co-relation 13492. Up to 2964 conditions per place. [2024-06-14 12:36:13,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-14 12:36:13,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1248 flow [2024-06-14 12:36:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:36:13,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:36:13,112 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 909 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:36:13,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1248 flow [2024-06-14 12:36:13,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1156 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:13,141 INFO L231 Difference]: Finished difference. Result has 83 places, 100 transitions, 917 flow [2024-06-14 12:36:13,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=917, PETRI_PLACES=83, PETRI_TRANSITIONS=100} [2024-06-14 12:36:13,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-14 12:36:13,146 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 100 transitions, 917 flow [2024-06-14 12:36:13,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:13,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:13,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:13,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:36:13,147 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:13,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2113124872, now seen corresponding path program 1 times [2024-06-14 12:36:13,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503668204] [2024-06-14 12:36:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:13,802 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 12:36:13,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:13,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503668204] [2024-06-14 12:36:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503668204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:13,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:36:13,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973022992] [2024-06-14 12:36:13,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:36:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:36:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:36:13,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:13,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 100 transitions, 917 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:13,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:13,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:13,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:14,464 INFO L124 PetriNetUnfolderBase]: 2005/3037 cut-off events. [2024-06-14 12:36:14,464 INFO L125 PetriNetUnfolderBase]: For 18740/18740 co-relation queries the response was YES. [2024-06-14 12:36:14,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13867 conditions, 3037 events. 2005/3037 cut-off events. For 18740/18740 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14339 event pairs, 1022 based on Foata normal form. 3/3039 useless extension candidates. Maximal degree in co-relation 13828. Up to 2988 conditions per place. [2024-06-14 12:36:14,492 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 99 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2024-06-14 12:36:14,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 1183 flow [2024-06-14 12:36:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 12:36:14,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:36:14,494 INFO L175 Difference]: Start difference. First operand has 83 places, 100 transitions, 917 flow. Second operand 6 states and 94 transitions. [2024-06-14 12:36:14,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 1183 flow [2024-06-14 12:36:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 1140 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:14,523 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 930 flow [2024-06-14 12:36:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=930, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-14 12:36:14,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 12:36:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 930 flow [2024-06-14 12:36:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:14,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:14,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:14,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:36:14,525 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 12:36:14,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash 728842812, now seen corresponding path program 1 times [2024-06-14 12:36:14,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:14,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16263717] [2024-06-14 12:36:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:14,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:15,430 INFO 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 12:36:15,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:15,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16263717] [2024-06-14 12:36:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16263717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:15,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:15,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396094916] [2024-06-14 12:36:15,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:15,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:15,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:15,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:15,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 930 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:16,291 INFO L124 PetriNetUnfolderBase]: 1965/3006 cut-off events. [2024-06-14 12:36:16,291 INFO L125 PetriNetUnfolderBase]: For 20135/20171 co-relation queries the response was YES. [2024-06-14 12:36:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 3006 events. 1965/3006 cut-off events. For 20135/20171 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14957 event pairs, 507 based on Foata normal form. 40/3042 useless extension candidates. Maximal degree in co-relation 14082. Up to 2631 conditions per place. [2024-06-14 12:36:16,318 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 103 selfloop transitions, 44 changer transitions 0/152 dead transitions. [2024-06-14 12:36:16,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1505 flow [2024-06-14 12:36:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:36:16,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-14 12:36:16,321 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 930 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:36:16,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1505 flow [2024-06-14 12:36:16,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 152 transitions, 1471 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:16,351 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 1102 flow [2024-06-14 12:36:16,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1102, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-06-14 12:36:16,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 12:36:16,353 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 1102 flow [2024-06-14 12:36:16,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:16,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:16,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:16,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:36:16,354 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:16,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash 282589732, now seen corresponding path program 2 times [2024-06-14 12:36:16,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:16,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627231897] [2024-06-14 12:36:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:17,006 INFO 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 12:36:17,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:17,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627231897] [2024-06-14 12:36:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627231897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:17,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695160835] [2024-06-14 12:36:17,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:17,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:17,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:17,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:17,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:17,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 1102 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:17,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:17,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:17,790 INFO L124 PetriNetUnfolderBase]: 2022/3106 cut-off events. [2024-06-14 12:36:17,790 INFO L125 PetriNetUnfolderBase]: For 25130/25154 co-relation queries the response was YES. [2024-06-14 12:36:17,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15513 conditions, 3106 events. 2022/3106 cut-off events. For 25130/25154 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15632 event pairs, 562 based on Foata normal form. 28/3131 useless extension candidates. Maximal degree in co-relation 15471. Up to 2506 conditions per place. [2024-06-14 12:36:17,820 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 85 selfloop transitions, 84 changer transitions 0/174 dead transitions. [2024-06-14 12:36:17,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1952 flow [2024-06-14 12:36:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:36:17,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-14 12:36:17,822 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 1102 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:36:17,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1952 flow [2024-06-14 12:36:17,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 174 transitions, 1882 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:17,866 INFO L231 Difference]: Finished difference. Result has 95 places, 141 transitions, 1583 flow [2024-06-14 12:36:17,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1583, PETRI_PLACES=95, PETRI_TRANSITIONS=141} [2024-06-14 12:36:17,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:36:17,867 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 141 transitions, 1583 flow [2024-06-14 12:36:17,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:17,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:36:17,868 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 12:36:17,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2075876482, now seen corresponding path program 3 times [2024-06-14 12:36:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:17,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338684262] [2024-06-14 12:36:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:18,930 INFO 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 12:36:18,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:18,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338684262] [2024-06-14 12:36:18,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338684262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:18,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:18,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:18,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654556833] [2024-06-14 12:36:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:19,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:19,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 141 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:19,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:19,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:19,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:19,634 INFO L124 PetriNetUnfolderBase]: 2075/3183 cut-off events. [2024-06-14 12:36:19,634 INFO L125 PetriNetUnfolderBase]: For 29569/29599 co-relation queries the response was YES. [2024-06-14 12:36:19,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17100 conditions, 3183 events. 2075/3183 cut-off events. For 29569/29599 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16040 event pairs, 497 based on Foata normal form. 38/3218 useless extension candidates. Maximal degree in co-relation 17054. Up to 2600 conditions per place. [2024-06-14 12:36:19,666 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-06-14 12:36:19,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 2087 flow [2024-06-14 12:36:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:36:19,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 12:36:19,668 INFO L175 Difference]: Start difference. First operand has 95 places, 141 transitions, 1583 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:36:19,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 2087 flow [2024-06-14 12:36:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 177 transitions, 2037 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:19,725 INFO L231 Difference]: Finished difference. Result has 100 places, 141 transitions, 1709 flow [2024-06-14 12:36:19,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=100, PETRI_TRANSITIONS=141} [2024-06-14 12:36:19,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 12:36:19,726 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 141 transitions, 1709 flow [2024-06-14 12:36:19,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:19,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:19,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:36:19,727 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 12:36:19,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash -47515680, now seen corresponding path program 1 times [2024-06-14 12:36:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903876690] [2024-06-14 12:36:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:20,840 INFO 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 12:36:20,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:20,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903876690] [2024-06-14 12:36:20,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903876690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:20,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:20,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:20,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333353983] [2024-06-14 12:36:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:20,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:20,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 141 transitions, 1709 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:20,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:21,549 INFO L124 PetriNetUnfolderBase]: 2268/3436 cut-off events. [2024-06-14 12:36:21,549 INFO L125 PetriNetUnfolderBase]: For 32195/32195 co-relation queries the response was YES. [2024-06-14 12:36:21,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3436 events. 2268/3436 cut-off events. For 32195/32195 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16665 event pairs, 1045 based on Foata normal form. 3/3438 useless extension candidates. Maximal degree in co-relation 18746. Up to 3313 conditions per place. [2024-06-14 12:36:21,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 139 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-14 12:36:21,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 170 transitions, 2258 flow [2024-06-14 12:36:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:36:21,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:36:21,585 INFO L175 Difference]: Start difference. First operand has 100 places, 141 transitions, 1709 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:36:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 170 transitions, 2258 flow [2024-06-14 12:36:21,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 170 transitions, 2040 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:21,648 INFO L231 Difference]: Finished difference. Result has 102 places, 149 transitions, 1711 flow [2024-06-14 12:36:21,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=102, PETRI_TRANSITIONS=149} [2024-06-14 12:36:21,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:36:21,649 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 149 transitions, 1711 flow [2024-06-14 12:36:21,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:21,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:21,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:36:21,650 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 12:36:21,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -393254834, now seen corresponding path program 1 times [2024-06-14 12:36:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:21,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176211404] [2024-06-14 12:36:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:21,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:22,670 INFO 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 12:36:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176211404] [2024-06-14 12:36:22,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176211404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:22,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:22,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609482958] [2024-06-14 12:36:22,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:22,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:22,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 149 transitions, 1711 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:22,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:22,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:22,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:23,485 INFO L124 PetriNetUnfolderBase]: 2418/3748 cut-off events. [2024-06-14 12:36:23,485 INFO L125 PetriNetUnfolderBase]: For 36887/36933 co-relation queries the response was YES. [2024-06-14 12:36:23,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 3748 events. 2418/3748 cut-off events. For 36887/36933 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20068 event pairs, 578 based on Foata normal form. 62/3802 useless extension candidates. Maximal degree in co-relation 19721. Up to 2829 conditions per place. [2024-06-14 12:36:23,516 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 154 selfloop transitions, 47 changer transitions 0/206 dead transitions. [2024-06-14 12:36:23,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 206 transitions, 2488 flow [2024-06-14 12:36:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:36:23,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-14 12:36:23,519 INFO L175 Difference]: Start difference. First operand has 102 places, 149 transitions, 1711 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:36:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 206 transitions, 2488 flow [2024-06-14 12:36:23,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 206 transitions, 2386 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:23,583 INFO L231 Difference]: Finished difference. Result has 105 places, 153 transitions, 1784 flow [2024-06-14 12:36:23,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1784, PETRI_PLACES=105, PETRI_TRANSITIONS=153} [2024-06-14 12:36:23,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 12:36:23,584 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 153 transitions, 1784 flow [2024-06-14 12:36:23,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:23,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:23,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:36:23,585 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 12:36:23,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash -587133794, now seen corresponding path program 2 times [2024-06-14 12:36:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:23,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241540164] [2024-06-14 12:36:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:23,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:24,575 INFO 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 12:36:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241540164] [2024-06-14 12:36:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241540164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:24,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:24,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226884274] [2024-06-14 12:36:24,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:24,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:24,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 153 transitions, 1784 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:24,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:24,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:24,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:25,556 INFO L124 PetriNetUnfolderBase]: 2500/3886 cut-off events. [2024-06-14 12:36:25,556 INFO L125 PetriNetUnfolderBase]: For 42449/42495 co-relation queries the response was YES. [2024-06-14 12:36:25,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20991 conditions, 3886 events. 2500/3886 cut-off events. For 42449/42495 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21034 event pairs, 635 based on Foata normal form. 74/3954 useless extension candidates. Maximal degree in co-relation 20941. Up to 3315 conditions per place. [2024-06-14 12:36:25,584 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 151 selfloop transitions, 49 changer transitions 0/205 dead transitions. [2024-06-14 12:36:25,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 205 transitions, 2461 flow [2024-06-14 12:36:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:36:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:36:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:36:25,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-14 12:36:25,588 INFO L175 Difference]: Start difference. First operand has 105 places, 153 transitions, 1784 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:36:25,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 205 transitions, 2461 flow [2024-06-14 12:36:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 205 transitions, 2402 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:25,663 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 1861 flow [2024-06-14 12:36:25,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1861, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2024-06-14 12:36:25,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 12:36:25,664 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 1861 flow [2024-06-14 12:36:25,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:25,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:25,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:25,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:36:25,665 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 12:36:25,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash 608798016, now seen corresponding path program 3 times [2024-06-14 12:36:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:25,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529261245] [2024-06-14 12:36:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:25,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529261245] [2024-06-14 12:36:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529261245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:26,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890700562] [2024-06-14 12:36:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:26,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:26,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 1861 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:26,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:26,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:26,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:27,307 INFO L124 PetriNetUnfolderBase]: 3114/4960 cut-off events. [2024-06-14 12:36:27,307 INFO L125 PetriNetUnfolderBase]: For 57006/57041 co-relation queries the response was YES. [2024-06-14 12:36:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26935 conditions, 4960 events. 3114/4960 cut-off events. For 57006/57041 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29444 event pairs, 527 based on Foata normal form. 44/4997 useless extension candidates. Maximal degree in co-relation 26883. Up to 2403 conditions per place. [2024-06-14 12:36:27,336 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 100 changer transitions 0/217 dead transitions. [2024-06-14 12:36:27,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 217 transitions, 2824 flow [2024-06-14 12:36:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:36:27,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 12:36:27,338 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 1861 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:36:27,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 217 transitions, 2824 flow [2024-06-14 12:36:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2709 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:36:27,425 INFO L231 Difference]: Finished difference. Result has 112 places, 167 transitions, 2190 flow [2024-06-14 12:36:27,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2190, PETRI_PLACES=112, PETRI_TRANSITIONS=167} [2024-06-14 12:36:27,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 12:36:27,426 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 167 transitions, 2190 flow [2024-06-14 12:36:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:27,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:27,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:36:27,427 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 12:36:27,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash 170027756, now seen corresponding path program 4 times [2024-06-14 12:36:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:27,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258001984] [2024-06-14 12:36:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:27,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:28,124 INFO 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 12:36:28,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258001984] [2024-06-14 12:36:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258001984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:28,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995920295] [2024-06-14 12:36:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:28,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:28,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 167 transitions, 2190 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:28,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:28,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:29,190 INFO L124 PetriNetUnfolderBase]: 3562/5678 cut-off events. [2024-06-14 12:36:29,190 INFO L125 PetriNetUnfolderBase]: For 76204/76257 co-relation queries the response was YES. [2024-06-14 12:36:29,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 5678 events. 3562/5678 cut-off events. For 76204/76257 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34855 event pairs, 981 based on Foata normal form. 74/5745 useless extension candidates. Maximal degree in co-relation 32251. Up to 3352 conditions per place. [2024-06-14 12:36:29,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 106 changer transitions 0/228 dead transitions. [2024-06-14 12:36:29,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 228 transitions, 3229 flow [2024-06-14 12:36:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:36:29,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-14 12:36:29,233 INFO L175 Difference]: Start difference. First operand has 112 places, 167 transitions, 2190 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:36:29,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 228 transitions, 3229 flow [2024-06-14 12:36:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 228 transitions, 3114 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:29,333 INFO L231 Difference]: Finished difference. Result has 117 places, 176 transitions, 2511 flow [2024-06-14 12:36:29,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2511, PETRI_PLACES=117, PETRI_TRANSITIONS=176} [2024-06-14 12:36:29,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 12:36:29,334 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 176 transitions, 2511 flow [2024-06-14 12:36:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:29,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:29,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:36:29,335 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:29,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash 170347676, now seen corresponding path program 5 times [2024-06-14 12:36:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133133120] [2024-06-14 12:36:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:30,104 INFO 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 12:36:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133133120] [2024-06-14 12:36:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133133120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:30,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:30,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774475862] [2024-06-14 12:36:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:30,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:30,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:30,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 176 transitions, 2511 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:30,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:30,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:30,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:31,153 INFO L124 PetriNetUnfolderBase]: 3575/5713 cut-off events. [2024-06-14 12:36:31,153 INFO L125 PetriNetUnfolderBase]: For 83919/83986 co-relation queries the response was YES. [2024-06-14 12:36:31,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33692 conditions, 5713 events. 3575/5713 cut-off events. For 83919/83986 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35249 event pairs, 1063 based on Foata normal form. 94/5804 useless extension candidates. Maximal degree in co-relation 33635. Up to 4524 conditions per place. [2024-06-14 12:36:31,192 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 96 changer transitions 0/221 dead transitions. [2024-06-14 12:36:31,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 221 transitions, 3307 flow [2024-06-14 12:36:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:36:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:36:31,194 INFO L175 Difference]: Start difference. First operand has 117 places, 176 transitions, 2511 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:36:31,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 221 transitions, 3307 flow [2024-06-14 12:36:31,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 221 transitions, 3176 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:31,315 INFO L231 Difference]: Finished difference. Result has 120 places, 177 transitions, 2618 flow [2024-06-14 12:36:31,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2618, PETRI_PLACES=120, PETRI_TRANSITIONS=177} [2024-06-14 12:36:31,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 12:36:31,315 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 177 transitions, 2618 flow [2024-06-14 12:36:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:31,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:36:31,316 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:31,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 924558183, now seen corresponding path program 1 times [2024-06-14 12:36:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439218017] [2024-06-14 12:36:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:31,905 INFO 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 12:36:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439218017] [2024-06-14 12:36:31,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439218017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:31,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:31,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:31,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667997308] [2024-06-14 12:36:31,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:31,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:31,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 177 transitions, 2618 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 12:36:31,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:31,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:31,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:32,818 INFO L124 PetriNetUnfolderBase]: 3979/6261 cut-off events. [2024-06-14 12:36:32,818 INFO L125 PetriNetUnfolderBase]: For 85784/85784 co-relation queries the response was YES. [2024-06-14 12:36:32,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37276 conditions, 6261 events. 3979/6261 cut-off events. For 85784/85784 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37335 event pairs, 1865 based on Foata normal form. 3/6263 useless extension candidates. Maximal degree in co-relation 37218. Up to 6093 conditions per place. [2024-06-14 12:36:32,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-14 12:36:32,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 3224 flow [2024-06-14 12:36:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:36:32,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 12:36:32,868 INFO L175 Difference]: Start difference. First operand has 120 places, 177 transitions, 2618 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:36:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 3224 flow [2024-06-14 12:36:32,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 209 transitions, 3026 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:33,001 INFO L231 Difference]: Finished difference. Result has 123 places, 189 transitions, 2597 flow [2024-06-14 12:36:33,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=123, PETRI_TRANSITIONS=189} [2024-06-14 12:36:33,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 12:36:33,001 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 189 transitions, 2597 flow [2024-06-14 12:36:33,001 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 12:36:33,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:33,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:33,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:36:33,002 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 12:36:33,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash 72278624, now seen corresponding path program 6 times [2024-06-14 12:36:33,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593649632] [2024-06-14 12:36:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:33,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:34,004 INFO 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 12:36:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593649632] [2024-06-14 12:36:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593649632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:34,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473808607] [2024-06-14 12:36:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:34,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:34,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:34,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 189 transitions, 2597 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:34,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:34,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:34,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:35,065 INFO L124 PetriNetUnfolderBase]: 4075/6522 cut-off events. [2024-06-14 12:36:35,065 INFO L125 PetriNetUnfolderBase]: For 98748/98799 co-relation queries the response was YES. [2024-06-14 12:36:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39245 conditions, 6522 events. 4075/6522 cut-off events. For 98748/98799 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 41275 event pairs, 992 based on Foata normal form. 72/6587 useless extension candidates. Maximal degree in co-relation 39184. Up to 3378 conditions per place. [2024-06-14 12:36:35,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 103 changer transitions 0/243 dead transitions. [2024-06-14 12:36:35,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 243 transitions, 3518 flow [2024-06-14 12:36:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:36:35,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-14 12:36:35,122 INFO L175 Difference]: Start difference. First operand has 123 places, 189 transitions, 2597 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:36:35,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 243 transitions, 3518 flow [2024-06-14 12:36:35,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 243 transitions, 3494 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 12:36:35,267 INFO L231 Difference]: Finished difference. Result has 131 places, 197 transitions, 3017 flow [2024-06-14 12:36:35,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3017, PETRI_PLACES=131, PETRI_TRANSITIONS=197} [2024-06-14 12:36:35,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 12:36:35,268 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 197 transitions, 3017 flow [2024-06-14 12:36:35,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:35,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:35,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:36:35,268 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 12:36:35,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1786925360, now seen corresponding path program 7 times [2024-06-14 12:36:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:35,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802118556] [2024-06-14 12:36:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:35,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:36,172 INFO 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 12:36:36,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:36,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802118556] [2024-06-14 12:36:36,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802118556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:36,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:36,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:36,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650193801] [2024-06-14 12:36:36,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:36,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:36,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:36,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 197 transitions, 3017 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:36,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:36,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:37,379 INFO L124 PetriNetUnfolderBase]: 4430/7103 cut-off events. [2024-06-14 12:36:37,380 INFO L125 PetriNetUnfolderBase]: For 123849/123912 co-relation queries the response was YES. [2024-06-14 12:36:37,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44817 conditions, 7103 events. 4430/7103 cut-off events. For 123849/123912 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46182 event pairs, 1415 based on Foata normal form. 100/7197 useless extension candidates. Maximal degree in co-relation 44752. Up to 5689 conditions per place. [2024-06-14 12:36:37,441 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 109 changer transitions 0/249 dead transitions. [2024-06-14 12:36:37,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 249 transitions, 4024 flow [2024-06-14 12:36:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:36:37,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-14 12:36:37,443 INFO L175 Difference]: Start difference. First operand has 131 places, 197 transitions, 3017 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:36:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 249 transitions, 4024 flow [2024-06-14 12:36:37,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 249 transitions, 3894 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:37,611 INFO L231 Difference]: Finished difference. Result has 134 places, 211 transitions, 3421 flow [2024-06-14 12:36:37,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3421, PETRI_PLACES=134, PETRI_TRANSITIONS=211} [2024-06-14 12:36:37,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 12:36:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 211 transitions, 3421 flow [2024-06-14 12:36:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:37,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:37,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:36:37,613 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 12:36:37,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:37,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1784128850, now seen corresponding path program 8 times [2024-06-14 12:36:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818051678] [2024-06-14 12:36:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:38,543 INFO 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 12:36:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818051678] [2024-06-14 12:36:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818051678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343373164] [2024-06-14 12:36:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:38,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:36:38,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 211 transitions, 3421 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:38,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:38,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:36:38,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:39,766 INFO L124 PetriNetUnfolderBase]: 4606/7418 cut-off events. [2024-06-14 12:36:39,766 INFO L125 PetriNetUnfolderBase]: For 126052/126072 co-relation queries the response was YES. [2024-06-14 12:36:39,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46753 conditions, 7418 events. 4606/7418 cut-off events. For 126052/126072 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 48801 event pairs, 1676 based on Foata normal form. 90/7500 useless extension candidates. Maximal degree in co-relation 46687. Up to 6141 conditions per place. [2024-06-14 12:36:39,825 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 75 changer transitions 0/254 dead transitions. [2024-06-14 12:36:39,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 254 transitions, 4233 flow [2024-06-14 12:36:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:36:39,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 12:36:39,827 INFO L175 Difference]: Start difference. First operand has 134 places, 211 transitions, 3421 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:36:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 254 transitions, 4233 flow [2024-06-14 12:36:40,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 254 transitions, 4065 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:40,014 INFO L231 Difference]: Finished difference. Result has 138 places, 216 transitions, 3564 flow [2024-06-14 12:36:40,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3564, PETRI_PLACES=138, PETRI_TRANSITIONS=216} [2024-06-14 12:36:40,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 12:36:40,015 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 216 transitions, 3564 flow [2024-06-14 12:36:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:40,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:40,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:36:40,015 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:40,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1815342161, now seen corresponding path program 2 times [2024-06-14 12:36:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:40,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045297631] [2024-06-14 12:36:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:40,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045297631] [2024-06-14 12:36:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045297631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:40,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077895185] [2024-06-14 12:36:40,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:40,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:40,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 216 transitions, 3564 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 12:36:40,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:40,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:40,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:41,847 INFO L124 PetriNetUnfolderBase]: 5127/8153 cut-off events. [2024-06-14 12:36:41,847 INFO L125 PetriNetUnfolderBase]: For 130638/130638 co-relation queries the response was YES. [2024-06-14 12:36:42,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51640 conditions, 8153 events. 5127/8153 cut-off events. For 130638/130638 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 52309 event pairs, 2450 based on Foata normal form. 3/8155 useless extension candidates. Maximal degree in co-relation 51573. Up to 7931 conditions per place. [2024-06-14 12:36:42,039 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 27 changer transitions 0/242 dead transitions. [2024-06-14 12:36:42,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 242 transitions, 4241 flow [2024-06-14 12:36:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:36:42,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:36:42,041 INFO L175 Difference]: Start difference. First operand has 138 places, 216 transitions, 3564 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:36:42,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 242 transitions, 4241 flow [2024-06-14 12:36:42,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 242 transitions, 4018 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:42,247 INFO L231 Difference]: Finished difference. Result has 137 places, 224 transitions, 3509 flow [2024-06-14 12:36:42,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3509, PETRI_PLACES=137, PETRI_TRANSITIONS=224} [2024-06-14 12:36:42,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-14 12:36:42,248 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 224 transitions, 3509 flow [2024-06-14 12:36:42,248 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 12:36:42,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:42,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:36:42,249 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 12:36:42,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1384689668, now seen corresponding path program 1 times [2024-06-14 12:36:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920225016] [2024-06-14 12:36:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:43,190 INFO 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 12:36:43,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920225016] [2024-06-14 12:36:43,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920225016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:43,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:43,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127901099] [2024-06-14 12:36:43,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:43,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:43,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:43,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:43,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 224 transitions, 3509 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:43,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:43,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:43,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:44,419 INFO L124 PetriNetUnfolderBase]: 5177/8243 cut-off events. [2024-06-14 12:36:44,419 INFO L125 PetriNetUnfolderBase]: For 132734/132734 co-relation queries the response was YES. [2024-06-14 12:36:44,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51696 conditions, 8243 events. 5177/8243 cut-off events. For 132734/132734 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53120 event pairs, 2575 based on Foata normal form. 10/8252 useless extension candidates. Maximal degree in co-relation 51628. Up to 7933 conditions per place. [2024-06-14 12:36:44,485 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-14 12:36:44,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 262 transitions, 4362 flow [2024-06-14 12:36:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:36:44,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:36:44,486 INFO L175 Difference]: Start difference. First operand has 137 places, 224 transitions, 3509 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:36:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 262 transitions, 4362 flow [2024-06-14 12:36:44,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 262 transitions, 4307 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:44,690 INFO L231 Difference]: Finished difference. Result has 144 places, 233 transitions, 3761 flow [2024-06-14 12:36:44,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3761, PETRI_PLACES=144, PETRI_TRANSITIONS=233} [2024-06-14 12:36:44,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 12:36:44,691 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 233 transitions, 3761 flow [2024-06-14 12:36:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:44,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:44,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:36:44,691 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:44,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -842864796, now seen corresponding path program 2 times [2024-06-14 12:36:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:44,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110665259] [2024-06-14 12:36:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:45,705 INFO 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 12:36:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110665259] [2024-06-14 12:36:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110665259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:45,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641394470] [2024-06-14 12:36:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:45,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:45,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:45,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 233 transitions, 3761 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:45,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:45,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:47,171 INFO L124 PetriNetUnfolderBase]: 5169/8211 cut-off events. [2024-06-14 12:36:47,172 INFO L125 PetriNetUnfolderBase]: For 138633/138633 co-relation queries the response was YES. [2024-06-14 12:36:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52456 conditions, 8211 events. 5169/8211 cut-off events. For 138633/138633 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 52390 event pairs, 2538 based on Foata normal form. 4/8214 useless extension candidates. Maximal degree in co-relation 52385. Up to 7984 conditions per place. [2024-06-14 12:36:47,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-14 12:36:47,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 259 transitions, 4395 flow [2024-06-14 12:36:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:36:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:36:47,235 INFO L175 Difference]: Start difference. First operand has 144 places, 233 transitions, 3761 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:36:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 259 transitions, 4395 flow [2024-06-14 12:36:47,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 259 transitions, 4231 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:47,441 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3676 flow [2024-06-14 12:36:47,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-14 12:36:47,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 12:36:47,441 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3676 flow [2024-06-14 12:36:47,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:47,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:47,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:36:47,442 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 12:36:47,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1148514556, now seen corresponding path program 1 times [2024-06-14 12:36:47,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:47,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614847234] [2024-06-14 12:36:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:48,371 INFO 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 12:36:48,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:48,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614847234] [2024-06-14 12:36:48,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614847234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:48,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:48,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:48,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130364279] [2024-06-14 12:36:48,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:48,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:48,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:48,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:48,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3676 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:48,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:48,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:48,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:49,535 INFO L124 PetriNetUnfolderBase]: 5134/8139 cut-off events. [2024-06-14 12:36:49,536 INFO L125 PetriNetUnfolderBase]: For 141443/141455 co-relation queries the response was YES. [2024-06-14 12:36:49,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52071 conditions, 8139 events. 5134/8139 cut-off events. For 141443/141455 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 51976 event pairs, 1935 based on Foata normal form. 13/8151 useless extension candidates. Maximal degree in co-relation 51999. Up to 7551 conditions per place. [2024-06-14 12:36:49,615 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 72 changer transitions 0/261 dead transitions. [2024-06-14 12:36:49,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 261 transitions, 4317 flow [2024-06-14 12:36:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:36:49,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-14 12:36:49,616 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3676 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:36:49,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 261 transitions, 4317 flow [2024-06-14 12:36:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 4240 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:49,916 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3772 flow [2024-06-14 12:36:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3772, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-14 12:36:49,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 12:36:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3772 flow [2024-06-14 12:36:49,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:49,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:36:49,918 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 12:36:49,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1732593552, now seen corresponding path program 3 times [2024-06-14 12:36:49,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:49,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234994740] [2024-06-14 12:36:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:50,973 INFO 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 12:36:50,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234994740] [2024-06-14 12:36:50,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234994740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:50,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:50,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975678365] [2024-06-14 12:36:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:50,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:50,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:51,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:51,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3772 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:51,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:51,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:51,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:52,462 INFO L124 PetriNetUnfolderBase]: 5111/8131 cut-off events. [2024-06-14 12:36:52,462 INFO L125 PetriNetUnfolderBase]: For 150742/150742 co-relation queries the response was YES. [2024-06-14 12:36:52,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52254 conditions, 8131 events. 5111/8131 cut-off events. For 150742/150742 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52120 event pairs, 2564 based on Foata normal form. 10/8140 useless extension candidates. Maximal degree in co-relation 52181. Up to 7864 conditions per place. [2024-06-14 12:36:52,538 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 25 changer transitions 0/266 dead transitions. [2024-06-14 12:36:52,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 266 transitions, 4560 flow [2024-06-14 12:36:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:36:52,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:36:52,540 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3772 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:36:52,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 266 transitions, 4560 flow [2024-06-14 12:36:52,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 266 transitions, 4416 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:52,778 INFO L231 Difference]: Finished difference. Result has 150 places, 240 transitions, 3849 flow [2024-06-14 12:36:52,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=150, PETRI_TRANSITIONS=240} [2024-06-14 12:36:52,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-14 12:36:52,779 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 240 transitions, 3849 flow [2024-06-14 12:36:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:52,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:52,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:36:52,780 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 12:36:52,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1148514308, now seen corresponding path program 4 times [2024-06-14 12:36:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206802636] [2024-06-14 12:36:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206802636] [2024-06-14 12:36:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206802636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:53,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260488511] [2024-06-14 12:36:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:53,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:53,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:53,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:53,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 240 transitions, 3849 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:53,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:53,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:53,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:55,208 INFO L124 PetriNetUnfolderBase]: 5093/8106 cut-off events. [2024-06-14 12:36:55,209 INFO L125 PetriNetUnfolderBase]: For 155369/155369 co-relation queries the response was YES. [2024-06-14 12:36:55,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52111 conditions, 8106 events. 5093/8106 cut-off events. For 155369/155369 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 51986 event pairs, 2553 based on Foata normal form. 8/8113 useless extension candidates. Maximal degree in co-relation 52037. Up to 7783 conditions per place. [2024-06-14 12:36:55,290 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 36 changer transitions 0/270 dead transitions. [2024-06-14 12:36:55,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 270 transitions, 4592 flow [2024-06-14 12:36:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:36:55,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:36:55,291 INFO L175 Difference]: Start difference. First operand has 150 places, 240 transitions, 3849 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:36:55,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 270 transitions, 4592 flow [2024-06-14 12:36:55,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 270 transitions, 4461 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:55,546 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 3912 flow [2024-06-14 12:36:55,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3912, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-14 12:36:55,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 12:36:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 3912 flow [2024-06-14 12:36:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:55,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:55,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:36:55,548 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 12:36:55,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash -806511641, now seen corresponding path program 3 times [2024-06-14 12:36:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541114558] [2024-06-14 12:36:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:56,091 INFO 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 12:36:56,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:56,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541114558] [2024-06-14 12:36:56,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541114558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:56,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:56,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:56,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677545040] [2024-06-14 12:36:56,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:56,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:56,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:56,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 3912 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 12:36:56,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:56,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:56,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:57,307 INFO L124 PetriNetUnfolderBase]: 5084/8093 cut-off events. [2024-06-14 12:36:57,307 INFO L125 PetriNetUnfolderBase]: For 160040/160040 co-relation queries the response was YES. [2024-06-14 12:36:57,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52198 conditions, 8093 events. 5084/8093 cut-off events. For 160040/160040 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51852 event pairs, 2566 based on Foata normal form. 3/8095 useless extension candidates. Maximal degree in co-relation 52123. Up to 7904 conditions per place. [2024-06-14 12:36:57,391 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 14 changer transitions 0/254 dead transitions. [2024-06-14 12:36:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 254 transitions, 4447 flow [2024-06-14 12:36:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:36:57,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 12:36:57,392 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 3912 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:36:57,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 254 transitions, 4447 flow [2024-06-14 12:36:57,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 254 transitions, 4301 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:57,651 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 3802 flow [2024-06-14 12:36:57,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3802, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-14 12:36:57,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 12:36:57,652 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 3802 flow [2024-06-14 12:36:57,652 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 12:36:57,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:57,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:36:57,652 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 12:36:57,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1289842187, now seen corresponding path program 1 times [2024-06-14 12:36:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350297181] [2024-06-14 12:36:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:58,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350297181] [2024-06-14 12:36:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350297181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:58,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:58,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056804005] [2024-06-14 12:36:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:58,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:58,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:36:58,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 3802 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 12:36:58,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:58,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:36:58,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:59,515 INFO L124 PetriNetUnfolderBase]: 5099/8112 cut-off events. [2024-06-14 12:36:59,515 INFO L125 PetriNetUnfolderBase]: For 162351/162351 co-relation queries the response was YES. [2024-06-14 12:36:59,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52137 conditions, 8112 events. 5099/8112 cut-off events. For 162351/162351 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51947 event pairs, 2574 based on Foata normal form. 3/8114 useless extension candidates. Maximal degree in co-relation 52061. Up to 7892 conditions per place. [2024-06-14 12:36:59,592 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 20 changer transitions 0/267 dead transitions. [2024-06-14 12:36:59,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 4496 flow [2024-06-14 12:36:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:36:59,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:36:59,594 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 3802 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:36:59,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 4496 flow [2024-06-14 12:36:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 267 transitions, 4445 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:59,868 INFO L231 Difference]: Finished difference. Result has 155 places, 250 transitions, 3855 flow [2024-06-14 12:36:59,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3855, PETRI_PLACES=155, PETRI_TRANSITIONS=250} [2024-06-14 12:36:59,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 12:36:59,868 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 250 transitions, 3855 flow [2024-06-14 12:36:59,869 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 12:36:59,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:59,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:36:59,869 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 12:36:59,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash -773437679, now seen corresponding path program 2 times [2024-06-14 12:36:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:59,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805220404] [2024-06-14 12:36:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:59,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:00,412 INFO 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 12:37:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805220404] [2024-06-14 12:37:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805220404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:37:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368236765] [2024-06-14 12:37:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:37:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:37:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:37:00,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:00,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 250 transitions, 3855 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 12:37:00,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:00,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:01,783 INFO L124 PetriNetUnfolderBase]: 5090/8101 cut-off events. [2024-06-14 12:37:01,783 INFO L125 PetriNetUnfolderBase]: For 169604/169606 co-relation queries the response was YES. [2024-06-14 12:37:01,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52819 conditions, 8101 events. 5090/8101 cut-off events. For 169604/169606 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51896 event pairs, 2575 based on Foata normal form. 5/8105 useless extension candidates. Maximal degree in co-relation 52743. Up to 7885 conditions per place. [2024-06-14 12:37:01,845 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 20 changer transitions 0/262 dead transitions. [2024-06-14 12:37:01,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 262 transitions, 4415 flow [2024-06-14 12:37:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:37:01,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:37:01,847 INFO L175 Difference]: Start difference. First operand has 155 places, 250 transitions, 3855 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:37:01,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 262 transitions, 4415 flow [2024-06-14 12:37:02,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 262 transitions, 4366 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:02,122 INFO L231 Difference]: Finished difference. Result has 159 places, 250 transitions, 3853 flow [2024-06-14 12:37:02,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3853, PETRI_PLACES=159, PETRI_TRANSITIONS=250} [2024-06-14 12:37:02,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 12:37:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 250 transitions, 3853 flow [2024-06-14 12:37:02,123 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 12:37:02,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:02,123 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 12:37:02,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:37:02,123 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:02,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1783208363, now seen corresponding path program 1 times [2024-06-14 12:37:02,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:02,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620743026] [2024-06-14 12:37:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:02,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:02,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:02,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620743026] [2024-06-14 12:37:02,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620743026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:02,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43540481] [2024-06-14 12:37:02,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:02,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:02,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:02,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:02,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 250 transitions, 3853 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 12:37:02,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:02,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:03,962 INFO L124 PetriNetUnfolderBase]: 5163/8180 cut-off events. [2024-06-14 12:37:03,962 INFO L125 PetriNetUnfolderBase]: For 178009/178033 co-relation queries the response was YES. [2024-06-14 12:37:04,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53313 conditions, 8180 events. 5163/8180 cut-off events. For 178009/178033 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52208 event pairs, 2093 based on Foata normal form. 30/8209 useless extension candidates. Maximal degree in co-relation 53235. Up to 7781 conditions per place. [2024-06-14 12:37:04,045 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 263 selfloop transitions, 51 changer transitions 0/317 dead transitions. [2024-06-14 12:37:04,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 317 transitions, 5168 flow [2024-06-14 12:37:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:37:04,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-14 12:37:04,046 INFO L175 Difference]: Start difference. First operand has 159 places, 250 transitions, 3853 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:37:04,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 317 transitions, 5168 flow [2024-06-14 12:37:04,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 317 transitions, 5100 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:04,595 INFO L231 Difference]: Finished difference. Result has 164 places, 284 transitions, 4377 flow [2024-06-14 12:37:04,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4377, PETRI_PLACES=164, PETRI_TRANSITIONS=284} [2024-06-14 12:37:04,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-14 12:37:04,595 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 284 transitions, 4377 flow [2024-06-14 12:37:04,596 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 12:37:04,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:04,596 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 12:37:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:37:04,596 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 12:37:04,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1898902936, now seen corresponding path program 1 times [2024-06-14 12:37:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:04,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006866214] [2024-06-14 12:37:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:04,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:05,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006866214] [2024-06-14 12:37:05,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006866214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:05,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:05,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543514082] [2024-06-14 12:37:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:05,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:05,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:05,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:05,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 284 transitions, 4377 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:05,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:05,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:05,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:07,115 INFO L124 PetriNetUnfolderBase]: 5269/8338 cut-off events. [2024-06-14 12:37:07,115 INFO L125 PetriNetUnfolderBase]: For 190725/190751 co-relation queries the response was YES. [2024-06-14 12:37:07,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56608 conditions, 8338 events. 5269/8338 cut-off events. For 190725/190751 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 53135 event pairs, 1982 based on Foata normal form. 30/8367 useless extension candidates. Maximal degree in co-relation 56526. Up to 7689 conditions per place. [2024-06-14 12:37:07,214 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-14 12:37:07,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 346 transitions, 5703 flow [2024-06-14 12:37:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:37:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:37:07,216 INFO L175 Difference]: Start difference. First operand has 164 places, 284 transitions, 4377 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:37:07,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 346 transitions, 5703 flow [2024-06-14 12:37:07,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 346 transitions, 5625 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-14 12:37:07,776 INFO L231 Difference]: Finished difference. Result has 175 places, 307 transitions, 5007 flow [2024-06-14 12:37:07,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5007, PETRI_PLACES=175, PETRI_TRANSITIONS=307} [2024-06-14 12:37:07,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 12:37:07,777 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 307 transitions, 5007 flow [2024-06-14 12:37:07,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:07,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:07,777 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 12:37:07,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:37:07,777 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 12:37:07,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1756060636, now seen corresponding path program 2 times [2024-06-14 12:37:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:07,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943868952] [2024-06-14 12:37:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:08,657 INFO 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 12:37:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943868952] [2024-06-14 12:37:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943868952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:08,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897200018] [2024-06-14 12:37:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:08,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:08,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 307 transitions, 5007 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:08,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:08,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:08,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:10,521 INFO L124 PetriNetUnfolderBase]: 5346/8457 cut-off events. [2024-06-14 12:37:10,522 INFO L125 PetriNetUnfolderBase]: For 203475/203491 co-relation queries the response was YES. [2024-06-14 12:37:10,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59001 conditions, 8457 events. 5346/8457 cut-off events. For 203475/203491 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53989 event pairs, 2011 based on Foata normal form. 20/8476 useless extension candidates. Maximal degree in co-relation 58913. Up to 7777 conditions per place. [2024-06-14 12:37:10,607 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 254 selfloop transitions, 106 changer transitions 0/363 dead transitions. [2024-06-14 12:37:10,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 363 transitions, 6329 flow [2024-06-14 12:37:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:37:10,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-14 12:37:10,609 INFO L175 Difference]: Start difference. First operand has 175 places, 307 transitions, 5007 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:37:10,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 363 transitions, 6329 flow [2024-06-14 12:37:11,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 363 transitions, 6174 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:11,006 INFO L231 Difference]: Finished difference. Result has 183 places, 328 transitions, 5624 flow [2024-06-14 12:37:11,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5624, PETRI_PLACES=183, PETRI_TRANSITIONS=328} [2024-06-14 12:37:11,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 12:37:11,007 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 328 transitions, 5624 flow [2024-06-14 12:37:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:11,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:11,008 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 12:37:11,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:37:11,008 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 12:37:11,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1761632266, now seen corresponding path program 3 times [2024-06-14 12:37:11,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:11,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294981453] [2024-06-14 12:37:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:11,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294981453] [2024-06-14 12:37:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294981453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:11,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:11,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204522693] [2024-06-14 12:37:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:11,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:12,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:12,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 328 transitions, 5624 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:12,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:12,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:12,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:13,804 INFO L124 PetriNetUnfolderBase]: 5398/8536 cut-off events. [2024-06-14 12:37:13,804 INFO L125 PetriNetUnfolderBase]: For 216996/217020 co-relation queries the response was YES. [2024-06-14 12:37:13,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60432 conditions, 8536 events. 5398/8536 cut-off events. For 216996/217020 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54493 event pairs, 1976 based on Foata normal form. 28/8563 useless extension candidates. Maximal degree in co-relation 60341. Up to 7691 conditions per place. [2024-06-14 12:37:13,905 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 259 selfloop transitions, 112 changer transitions 0/374 dead transitions. [2024-06-14 12:37:13,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 374 transitions, 6820 flow [2024-06-14 12:37:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:37:13,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:37:13,906 INFO L175 Difference]: Start difference. First operand has 183 places, 328 transitions, 5624 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:37:13,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 374 transitions, 6820 flow [2024-06-14 12:37:14,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 374 transitions, 6645 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:14,408 INFO L231 Difference]: Finished difference. Result has 189 places, 339 transitions, 5968 flow [2024-06-14 12:37:14,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=189, PETRI_TRANSITIONS=339} [2024-06-14 12:37:14,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-14 12:37:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 339 transitions, 5968 flow [2024-06-14 12:37:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:14,409 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 12:37:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:37:14,409 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 12:37:14,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1993482975, now seen corresponding path program 2 times [2024-06-14 12:37:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:14,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939014279] [2024-06-14 12:37:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:14,951 INFO 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 12:37:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939014279] [2024-06-14 12:37:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939014279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:14,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543957898] [2024-06-14 12:37:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:14,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:15,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:15,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 339 transitions, 5968 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 12:37:15,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:15,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:16,630 INFO L124 PetriNetUnfolderBase]: 5554/8758 cut-off events. [2024-06-14 12:37:16,631 INFO L125 PetriNetUnfolderBase]: For 237041/237059 co-relation queries the response was YES. [2024-06-14 12:37:16,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62837 conditions, 8758 events. 5554/8758 cut-off events. For 237041/237059 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 56118 event pairs, 2155 based on Foata normal form. 24/8781 useless extension candidates. Maximal degree in co-relation 62744. Up to 8213 conditions per place. [2024-06-14 12:37:16,739 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 319 selfloop transitions, 78 changer transitions 0/400 dead transitions. [2024-06-14 12:37:16,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 400 transitions, 7484 flow [2024-06-14 12:37:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:37:16,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-14 12:37:16,741 INFO L175 Difference]: Start difference. First operand has 189 places, 339 transitions, 5968 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:37:16,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 400 transitions, 7484 flow [2024-06-14 12:37:17,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 400 transitions, 7332 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:17,368 INFO L231 Difference]: Finished difference. Result has 196 places, 368 transitions, 6444 flow [2024-06-14 12:37:17,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=196, PETRI_TRANSITIONS=368} [2024-06-14 12:37:17,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 12:37:17,368 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 368 transitions, 6444 flow [2024-06-14 12:37:17,368 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 12:37:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:17,369 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 12:37:17,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:37:17,369 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:17,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1402400085, now seen corresponding path program 3 times [2024-06-14 12:37:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:17,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581862888] [2024-06-14 12:37:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:17,913 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 12:37:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581862888] [2024-06-14 12:37:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581862888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:17,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:17,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575297144] [2024-06-14 12:37:17,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:17,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:17,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:17,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 368 transitions, 6444 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 12:37:17,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:17,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:19,744 INFO L124 PetriNetUnfolderBase]: 5542/8746 cut-off events. [2024-06-14 12:37:19,744 INFO L125 PetriNetUnfolderBase]: For 245644/245670 co-relation queries the response was YES. [2024-06-14 12:37:19,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63988 conditions, 8746 events. 5542/8746 cut-off events. For 245644/245670 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 56047 event pairs, 2143 based on Foata normal form. 32/8777 useless extension candidates. Maximal degree in co-relation 63890. Up to 8209 conditions per place. [2024-06-14 12:37:19,827 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 317 selfloop transitions, 74 changer transitions 0/394 dead transitions. [2024-06-14 12:37:19,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 394 transitions, 7515 flow [2024-06-14 12:37:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:37:19,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:37:19,829 INFO L175 Difference]: Start difference. First operand has 196 places, 368 transitions, 6444 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:37:19,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 394 transitions, 7515 flow [2024-06-14 12:37:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 394 transitions, 7399 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-14 12:37:20,359 INFO L231 Difference]: Finished difference. Result has 203 places, 369 transitions, 6538 flow [2024-06-14 12:37:20,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6538, PETRI_PLACES=203, PETRI_TRANSITIONS=369} [2024-06-14 12:37:20,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 12:37:20,360 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 369 transitions, 6538 flow [2024-06-14 12:37:20,360 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 12:37:20,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:20,360 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 12:37:20,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:37:20,361 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1025176589, now seen corresponding path program 4 times [2024-06-14 12:37:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871149286] [2024-06-14 12:37:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:21,074 INFO 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 12:37:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871149286] [2024-06-14 12:37:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871149286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:21,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:21,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791512723] [2024-06-14 12:37:21,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:21,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:21,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 369 transitions, 6538 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 12:37:21,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:21,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:21,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:22,623 INFO L124 PetriNetUnfolderBase]: 5636/8873 cut-off events. [2024-06-14 12:37:22,623 INFO L125 PetriNetUnfolderBase]: For 260232/260252 co-relation queries the response was YES. [2024-06-14 12:37:22,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65648 conditions, 8873 events. 5636/8873 cut-off events. For 260232/260252 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 56820 event pairs, 2161 based on Foata normal form. 26/8898 useless extension candidates. Maximal degree in co-relation 65547. Up to 8239 conditions per place. [2024-06-14 12:37:22,738 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 308 selfloop transitions, 101 changer transitions 0/412 dead transitions. [2024-06-14 12:37:22,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 412 transitions, 7876 flow [2024-06-14 12:37:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:37:22,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-14 12:37:22,740 INFO L175 Difference]: Start difference. First operand has 203 places, 369 transitions, 6538 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:37:22,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 412 transitions, 7876 flow [2024-06-14 12:37:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 412 transitions, 7702 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:23,353 INFO L231 Difference]: Finished difference. Result has 207 places, 385 transitions, 6962 flow [2024-06-14 12:37:23,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6962, PETRI_PLACES=207, PETRI_TRANSITIONS=385} [2024-06-14 12:37:23,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 12:37:23,354 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 385 transitions, 6962 flow [2024-06-14 12:37:23,354 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 12:37:23,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:23,354 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 12:37:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:37:23,354 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 12:37:23,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1400408214, now seen corresponding path program 4 times [2024-06-14 12:37:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:23,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284646335] [2024-06-14 12:37:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:24,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284646335] [2024-06-14 12:37:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284646335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:24,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:24,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767219228] [2024-06-14 12:37:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:24,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:24,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:24,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:24,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:24,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 385 transitions, 6962 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:24,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:24,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:24,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:26,004 INFO L124 PetriNetUnfolderBase]: 5793/9125 cut-off events. [2024-06-14 12:37:26,004 INFO L125 PetriNetUnfolderBase]: For 285743/285769 co-relation queries the response was YES. [2024-06-14 12:37:26,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69528 conditions, 9125 events. 5793/9125 cut-off events. For 285743/285769 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 58680 event pairs, 2080 based on Foata normal form. 34/9158 useless extension candidates. Maximal degree in co-relation 69425. Up to 8316 conditions per place. [2024-06-14 12:37:26,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 138 changer transitions 0/455 dead transitions. [2024-06-14 12:37:26,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 455 transitions, 8935 flow [2024-06-14 12:37:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:37:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:37:26,120 INFO L175 Difference]: Start difference. First operand has 207 places, 385 transitions, 6962 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:37:26,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 455 transitions, 8935 flow [2024-06-14 12:37:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 455 transitions, 8829 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:26,813 INFO L231 Difference]: Finished difference. Result has 213 places, 421 transitions, 8081 flow [2024-06-14 12:37:26,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8081, PETRI_PLACES=213, PETRI_TRANSITIONS=421} [2024-06-14 12:37:26,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 12:37:26,814 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 421 transitions, 8081 flow [2024-06-14 12:37:26,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:26,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:26,815 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 12:37:26,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:37:26,815 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:26,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1608416600, now seen corresponding path program 5 times [2024-06-14 12:37:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:26,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767626105] [2024-06-14 12:37:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:26,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:27,758 INFO 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 12:37:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:27,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767626105] [2024-06-14 12:37:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767626105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539552873] [2024-06-14 12:37:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:27,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:27,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 421 transitions, 8081 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:27,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:29,574 INFO L124 PetriNetUnfolderBase]: 5838/9178 cut-off events. [2024-06-14 12:37:29,575 INFO L125 PetriNetUnfolderBase]: For 279071/279091 co-relation queries the response was YES. [2024-06-14 12:37:29,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70170 conditions, 9178 events. 5838/9178 cut-off events. For 279071/279091 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58849 event pairs, 2078 based on Foata normal form. 30/9207 useless extension candidates. Maximal degree in co-relation 70065. Up to 8383 conditions per place. [2024-06-14 12:37:29,696 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 311 selfloop transitions, 149 changer transitions 0/463 dead transitions. [2024-06-14 12:37:29,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 463 transitions, 9395 flow [2024-06-14 12:37:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:37:29,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:37:29,697 INFO L175 Difference]: Start difference. First operand has 213 places, 421 transitions, 8081 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:37:29,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 463 transitions, 9395 flow [2024-06-14 12:37:30,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 463 transitions, 9104 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:30,376 INFO L231 Difference]: Finished difference. Result has 217 places, 427 transitions, 8301 flow [2024-06-14 12:37:30,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8301, PETRI_PLACES=217, PETRI_TRANSITIONS=427} [2024-06-14 12:37:30,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 12:37:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 427 transitions, 8301 flow [2024-06-14 12:37:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:30,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:30,378 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 12:37:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:37:30,378 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:30,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1400198964, now seen corresponding path program 6 times [2024-06-14 12:37:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:30,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010091041] [2024-06-14 12:37:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:31,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:31,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010091041] [2024-06-14 12:37:31,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010091041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:31,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:31,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755453075] [2024-06-14 12:37:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:31,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:31,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:31,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 427 transitions, 8301 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:31,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:31,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:31,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:33,211 INFO L124 PetriNetUnfolderBase]: 5888/9267 cut-off events. [2024-06-14 12:37:33,211 INFO L125 PetriNetUnfolderBase]: For 298648/298674 co-relation queries the response was YES. [2024-06-14 12:37:33,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71289 conditions, 9267 events. 5888/9267 cut-off events. For 298648/298674 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 59708 event pairs, 2016 based on Foata normal form. 34/9300 useless extension candidates. Maximal degree in co-relation 71184. Up to 8032 conditions per place. [2024-06-14 12:37:33,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 168 changer transitions 0/468 dead transitions. [2024-06-14 12:37:33,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 468 transitions, 9688 flow [2024-06-14 12:37:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:37:33,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:37:33,321 INFO L175 Difference]: Start difference. First operand has 217 places, 427 transitions, 8301 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:37:33,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 468 transitions, 9688 flow [2024-06-14 12:37:34,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 468 transitions, 9291 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:34,139 INFO L231 Difference]: Finished difference. Result has 221 places, 437 transitions, 8632 flow [2024-06-14 12:37:34,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8632, PETRI_PLACES=221, PETRI_TRANSITIONS=437} [2024-06-14 12:37:34,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 12:37:34,140 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 437 transitions, 8632 flow [2024-06-14 12:37:34,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:34,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:34,141 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 12:37:34,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:37:34,141 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 12:37:34,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1024878059, now seen corresponding path program 5 times [2024-06-14 12:37:34,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:34,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047527758] [2024-06-14 12:37:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:34,769 INFO 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 12:37:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047527758] [2024-06-14 12:37:34,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047527758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:34,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:34,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112209430] [2024-06-14 12:37:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:34,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:34,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 437 transitions, 8632 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 12:37:34,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:34,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:34,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:36,528 INFO L124 PetriNetUnfolderBase]: 5972/9384 cut-off events. [2024-06-14 12:37:36,529 INFO L125 PetriNetUnfolderBase]: For 312049/312075 co-relation queries the response was YES. [2024-06-14 12:37:36,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73379 conditions, 9384 events. 5972/9384 cut-off events. For 312049/312075 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 60491 event pairs, 2232 based on Foata normal form. 32/9415 useless extension candidates. Maximal degree in co-relation 73272. Up to 8682 conditions per place. [2024-06-14 12:37:36,660 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 101 changer transitions 0/475 dead transitions. [2024-06-14 12:37:36,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 475 transitions, 10080 flow [2024-06-14 12:37:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:37:36,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:37:36,661 INFO L175 Difference]: Start difference. First operand has 221 places, 437 transitions, 8632 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:37:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 475 transitions, 10080 flow [2024-06-14 12:37:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 475 transitions, 9832 flow, removed 83 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:37,788 INFO L231 Difference]: Finished difference. Result has 226 places, 451 transitions, 8914 flow [2024-06-14 12:37:37,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8914, PETRI_PLACES=226, PETRI_TRANSITIONS=451} [2024-06-14 12:37:37,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 12:37:37,789 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 451 transitions, 8914 flow [2024-06-14 12:37:37,789 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 12:37:37,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:37,790 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 12:37:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:37:37,790 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 12:37:37,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash -690892146, now seen corresponding path program 7 times [2024-06-14 12:37:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:37,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093697997] [2024-06-14 12:37:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:38,676 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 12:37:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093697997] [2024-06-14 12:37:38,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093697997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:38,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209524173] [2024-06-14 12:37:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:38,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:38,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:38,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 451 transitions, 8914 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:38,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:38,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:40,675 INFO L124 PetriNetUnfolderBase]: 6022/9454 cut-off events. [2024-06-14 12:37:40,676 INFO L125 PetriNetUnfolderBase]: For 324805/324825 co-relation queries the response was YES. [2024-06-14 12:37:40,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74516 conditions, 9454 events. 6022/9454 cut-off events. For 324805/324825 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 60894 event pairs, 2097 based on Foata normal form. 28/9481 useless extension candidates. Maximal degree in co-relation 74406. Up to 8529 conditions per place. [2024-06-14 12:37:40,804 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 158 changer transitions 0/484 dead transitions. [2024-06-14 12:37:40,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 484 transitions, 10214 flow [2024-06-14 12:37:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:37:40,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:37:40,805 INFO L175 Difference]: Start difference. First operand has 226 places, 451 transitions, 8914 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:37:40,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 484 transitions, 10214 flow [2024-06-14 12:37:41,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 484 transitions, 10056 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:41,702 INFO L231 Difference]: Finished difference. Result has 229 places, 456 transitions, 9318 flow [2024-06-14 12:37:41,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9318, PETRI_PLACES=229, PETRI_TRANSITIONS=456} [2024-06-14 12:37:41,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 12:37:41,703 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 456 transitions, 9318 flow [2024-06-14 12:37:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:41,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:41,704 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 12:37:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:37:41,704 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:41,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1591292682, now seen corresponding path program 8 times [2024-06-14 12:37:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273188407] [2024-06-14 12:37:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:42,820 INFO 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 12:37:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:42,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273188407] [2024-06-14 12:37:42,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273188407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:42,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:42,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479364880] [2024-06-14 12:37:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:42,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:42,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 456 transitions, 9318 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:42,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:42,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:42,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:44,783 INFO L124 PetriNetUnfolderBase]: 6014/9431 cut-off events. [2024-06-14 12:37:44,783 INFO L125 PetriNetUnfolderBase]: For 327818/327820 co-relation queries the response was YES. [2024-06-14 12:37:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74967 conditions, 9431 events. 6014/9431 cut-off events. For 327818/327820 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 60308 event pairs, 2633 based on Foata normal form. 4/9434 useless extension candidates. Maximal degree in co-relation 74857. Up to 9182 conditions per place. [2024-06-14 12:37:44,907 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 458 selfloop transitions, 18 changer transitions 0/479 dead transitions. [2024-06-14 12:37:44,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 479 transitions, 10398 flow [2024-06-14 12:37:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:37:44,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:37:44,908 INFO L175 Difference]: Start difference. First operand has 229 places, 456 transitions, 9318 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:37:44,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 479 transitions, 10398 flow [2024-06-14 12:37:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 479 transitions, 10015 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:45,881 INFO L231 Difference]: Finished difference. Result has 231 places, 458 transitions, 9026 flow [2024-06-14 12:37:45,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8935, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9026, PETRI_PLACES=231, PETRI_TRANSITIONS=458} [2024-06-14 12:37:45,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-14 12:37:45,883 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 458 transitions, 9026 flow [2024-06-14 12:37:45,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:45,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:45,883 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 12:37:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:37:45,884 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 12:37:45,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash -690884706, now seen corresponding path program 9 times [2024-06-14 12:37:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:45,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193227325] [2024-06-14 12:37:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:46,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:46,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193227325] [2024-06-14 12:37:46,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193227325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:46,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:46,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764566130] [2024-06-14 12:37:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:46,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:46,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 458 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:46,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:46,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:48,700 INFO L124 PetriNetUnfolderBase]: 5991/9414 cut-off events. [2024-06-14 12:37:48,700 INFO L125 PetriNetUnfolderBase]: For 329714/329740 co-relation queries the response was YES. [2024-06-14 12:37:48,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73736 conditions, 9414 events. 5991/9414 cut-off events. For 329714/329740 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 60640 event pairs, 2035 based on Foata normal form. 34/9447 useless extension candidates. Maximal degree in co-relation 73625. Up to 8024 conditions per place. [2024-06-14 12:37:48,811 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 175 changer transitions 0/486 dead transitions. [2024-06-14 12:37:48,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 486 transitions, 10287 flow [2024-06-14 12:37:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:37:48,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 12:37:48,812 INFO L175 Difference]: Start difference. First operand has 231 places, 458 transitions, 9026 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:37:48,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 486 transitions, 10287 flow [2024-06-14 12:37:49,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 486 transitions, 10214 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:49,843 INFO L231 Difference]: Finished difference. Result has 233 places, 463 transitions, 9541 flow [2024-06-14 12:37:49,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8953, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9541, PETRI_PLACES=233, PETRI_TRANSITIONS=463} [2024-06-14 12:37:49,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 12:37:49,844 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 463 transitions, 9541 flow [2024-06-14 12:37:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:49,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:49,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:49,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:37:49,844 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 12:37:49,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1582095912, now seen corresponding path program 10 times [2024-06-14 12:37:49,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:49,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515439017] [2024-06-14 12:37:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515439017] [2024-06-14 12:37:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515439017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860637581] [2024-06-14 12:37:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:50,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 463 transitions, 9541 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:50,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:50,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:50,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:52,948 INFO L124 PetriNetUnfolderBase]: 6030/9480 cut-off events. [2024-06-14 12:37:52,948 INFO L125 PetriNetUnfolderBase]: For 352191/352217 co-relation queries the response was YES. [2024-06-14 12:37:53,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75742 conditions, 9480 events. 6030/9480 cut-off events. For 352191/352217 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 61239 event pairs, 1967 based on Foata normal form. 32/9511 useless extension candidates. Maximal degree in co-relation 75630. Up to 7920 conditions per place. [2024-06-14 12:37:53,043 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 198 changer transitions 0/497 dead transitions. [2024-06-14 12:37:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 497 transitions, 11001 flow [2024-06-14 12:37:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:37:53,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 12:37:53,044 INFO L175 Difference]: Start difference. First operand has 233 places, 463 transitions, 9541 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:37:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 497 transitions, 11001 flow [2024-06-14 12:37:54,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 497 transitions, 10516 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:54,119 INFO L231 Difference]: Finished difference. Result has 235 places, 471 transitions, 9716 flow [2024-06-14 12:37:54,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9060, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9716, PETRI_PLACES=235, PETRI_TRANSITIONS=471} [2024-06-14 12:37:54,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 12:37:54,119 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 471 transitions, 9716 flow [2024-06-14 12:37:54,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:54,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:54,120 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 12:37:54,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:37:54,120 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 12:37:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1243291142, now seen corresponding path program 11 times [2024-06-14 12:37:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768083476] [2024-06-14 12:37:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:55,145 INFO 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 12:37:55,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768083476] [2024-06-14 12:37:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768083476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:55,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:55,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757343516] [2024-06-14 12:37:55,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:55,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:55,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:55,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:55,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:55,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 471 transitions, 9716 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:55,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:55,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:55,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:57,132 INFO L124 PetriNetUnfolderBase]: 6012/9446 cut-off events. [2024-06-14 12:37:57,133 INFO L125 PetriNetUnfolderBase]: For 339905/339925 co-relation queries the response was YES. [2024-06-14 12:37:57,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75142 conditions, 9446 events. 6012/9446 cut-off events. For 339905/339925 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 60868 event pairs, 2041 based on Foata normal form. 26/9471 useless extension candidates. Maximal degree in co-relation 75029. Up to 8450 conditions per place. [2024-06-14 12:37:57,248 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 174 changer transitions 0/501 dead transitions. [2024-06-14 12:37:57,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 501 transitions, 10877 flow [2024-06-14 12:37:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:37:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:37:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:37:57,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:37:57,250 INFO L175 Difference]: Start difference. First operand has 235 places, 471 transitions, 9716 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:37:57,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 501 transitions, 10877 flow [2024-06-14 12:37:58,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 501 transitions, 10619 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:58,501 INFO L231 Difference]: Finished difference. Result has 239 places, 471 transitions, 9855 flow [2024-06-14 12:37:58,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9855, PETRI_PLACES=239, PETRI_TRANSITIONS=471} [2024-06-14 12:37:58,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 12:37:58,501 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 471 transitions, 9855 flow [2024-06-14 12:37:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:58,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:58,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:58,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:37:58,502 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:58,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1014701069, now seen corresponding path program 6 times [2024-06-14 12:37:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632741877] [2024-06-14 12:37:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:58,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632741877] [2024-06-14 12:37:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632741877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:59,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:37:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982614265] [2024-06-14 12:37:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:37:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:37:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:37:59,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:37:59,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 471 transitions, 9855 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 12:37:59,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:59,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:37:59,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:00,957 INFO L124 PetriNetUnfolderBase]: 6000/9441 cut-off events. [2024-06-14 12:38:00,957 INFO L125 PetriNetUnfolderBase]: For 344461/344463 co-relation queries the response was YES. [2024-06-14 12:38:01,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75553 conditions, 9441 events. 6000/9441 cut-off events. For 344461/344463 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61074 event pairs, 2653 based on Foata normal form. 8/9448 useless extension candidates. Maximal degree in co-relation 75438. Up to 9162 conditions per place. [2024-06-14 12:38:01,084 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 32 changer transitions 0/486 dead transitions. [2024-06-14 12:38:01,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 486 transitions, 10972 flow [2024-06-14 12:38:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:38:01,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:38:01,085 INFO L175 Difference]: Start difference. First operand has 239 places, 471 transitions, 9855 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:38:01,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 486 transitions, 10972 flow [2024-06-14 12:38:02,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 486 transitions, 10546 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:02,068 INFO L231 Difference]: Finished difference. Result has 240 places, 471 transitions, 9506 flow [2024-06-14 12:38:02,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9429, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9506, PETRI_PLACES=240, PETRI_TRANSITIONS=471} [2024-06-14 12:38:02,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-14 12:38:02,069 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 471 transitions, 9506 flow [2024-06-14 12:38:02,069 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 12:38:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:02,070 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 12:38:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:38:02,070 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:02,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -17285927, now seen corresponding path program 1 times [2024-06-14 12:38:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:02,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56716666] [2024-06-14 12:38:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:02,764 INFO 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 12:38:02,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56716666] [2024-06-14 12:38:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56716666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094604004] [2024-06-14 12:38:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:02,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 471 transitions, 9506 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 12:38:02,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:02,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:02,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:04,785 INFO L124 PetriNetUnfolderBase]: 5994/9432 cut-off events. [2024-06-14 12:38:04,785 INFO L125 PetriNetUnfolderBase]: For 342242/342242 co-relation queries the response was YES. [2024-06-14 12:38:04,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74768 conditions, 9432 events. 5994/9432 cut-off events. For 342242/342242 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 60984 event pairs, 2645 based on Foata normal form. 2/9433 useless extension candidates. Maximal degree in co-relation 74652. Up to 9235 conditions per place. [2024-06-14 12:38:04,902 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 15 changer transitions 0/485 dead transitions. [2024-06-14 12:38:04,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 485 transitions, 10568 flow [2024-06-14 12:38:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:38:04,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 12:38:04,904 INFO L175 Difference]: Start difference. First operand has 240 places, 471 transitions, 9506 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:38:04,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 485 transitions, 10568 flow [2024-06-14 12:38:05,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 485 transitions, 10377 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:05,906 INFO L231 Difference]: Finished difference. Result has 241 places, 474 transitions, 9417 flow [2024-06-14 12:38:05,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9315, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9417, PETRI_PLACES=241, PETRI_TRANSITIONS=474} [2024-06-14 12:38:05,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-14 12:38:05,907 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 474 transitions, 9417 flow [2024-06-14 12:38:05,907 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 12:38:05,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:05,907 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 12:38:05,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:38:05,907 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:05,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1592863367, now seen corresponding path program 1 times [2024-06-14 12:38:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:05,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084741093] [2024-06-14 12:38:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:06,552 INFO 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 12:38:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:06,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084741093] [2024-06-14 12:38:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084741093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:06,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75940046] [2024-06-14 12:38:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:06,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:06,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 474 transitions, 9417 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 12:38:06,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:06,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:08,538 INFO L124 PetriNetUnfolderBase]: 6024/9474 cut-off events. [2024-06-14 12:38:08,538 INFO L125 PetriNetUnfolderBase]: For 355199/355199 co-relation queries the response was YES. [2024-06-14 12:38:08,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74905 conditions, 9474 events. 6024/9474 cut-off events. For 355199/355199 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 61188 event pairs, 2655 based on Foata normal form. 6/9479 useless extension candidates. Maximal degree in co-relation 74791. Up to 9243 conditions per place. [2024-06-14 12:38:08,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 475 selfloop transitions, 17 changer transitions 0/495 dead transitions. [2024-06-14 12:38:08,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 495 transitions, 10521 flow [2024-06-14 12:38:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:38:08,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:38:08,663 INFO L175 Difference]: Start difference. First operand has 241 places, 474 transitions, 9417 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:38:08,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 495 transitions, 10521 flow [2024-06-14 12:38:09,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 495 transitions, 10347 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:09,883 INFO L231 Difference]: Finished difference. Result has 242 places, 477 transitions, 9330 flow [2024-06-14 12:38:09,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9243, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9330, PETRI_PLACES=242, PETRI_TRANSITIONS=477} [2024-06-14 12:38:09,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 12:38:09,884 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 477 transitions, 9330 flow [2024-06-14 12:38:09,884 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 12:38:09,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:09,884 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 12:38:09,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:38:09,884 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:09,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash 761699117, now seen corresponding path program 2 times [2024-06-14 12:38:09,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:09,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802860255] [2024-06-14 12:38:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:10,536 INFO 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 12:38:10,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:10,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802860255] [2024-06-14 12:38:10,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802860255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:10,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:10,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:10,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844777496] [2024-06-14 12:38:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:10,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:10,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:10,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:10,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 477 transitions, 9330 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 12:38:10,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:10,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:10,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:12,552 INFO L124 PetriNetUnfolderBase]: 6054/9516 cut-off events. [2024-06-14 12:38:12,553 INFO L125 PetriNetUnfolderBase]: For 364956/364956 co-relation queries the response was YES. [2024-06-14 12:38:12,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75397 conditions, 9516 events. 6054/9516 cut-off events. For 364956/364956 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 61503 event pairs, 2643 based on Foata normal form. 6/9521 useless extension candidates. Maximal degree in co-relation 75283. Up to 9189 conditions per place. [2024-06-14 12:38:12,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 470 selfloop transitions, 34 changer transitions 0/507 dead transitions. [2024-06-14 12:38:12,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 507 transitions, 10633 flow [2024-06-14 12:38:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:38:12,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:38:12,674 INFO L175 Difference]: Start difference. First operand has 242 places, 477 transitions, 9330 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:38:12,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 507 transitions, 10633 flow [2024-06-14 12:38:14,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 507 transitions, 10570 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:14,042 INFO L231 Difference]: Finished difference. Result has 245 places, 483 transitions, 9446 flow [2024-06-14 12:38:14,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9446, PETRI_PLACES=245, PETRI_TRANSITIONS=483} [2024-06-14 12:38:14,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-14 12:38:14,043 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 483 transitions, 9446 flow [2024-06-14 12:38:14,043 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 12:38:14,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:14,043 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 12:38:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:38:14,043 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 12:38:14,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash -295289023, now seen corresponding path program 3 times [2024-06-14 12:38:14,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618016978] [2024-06-14 12:38:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:14,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618016978] [2024-06-14 12:38:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618016978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:14,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472874964] [2024-06-14 12:38:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:14,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:14,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:14,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:14,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 483 transitions, 9446 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 12:38:14,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:14,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:14,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:16,868 INFO L124 PetriNetUnfolderBase]: 6036/9493 cut-off events. [2024-06-14 12:38:16,868 INFO L125 PetriNetUnfolderBase]: For 371934/371936 co-relation queries the response was YES. [2024-06-14 12:38:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75532 conditions, 9493 events. 6036/9493 cut-off events. For 371934/371936 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 61346 event pairs, 2649 based on Foata normal form. 6/9498 useless extension candidates. Maximal degree in co-relation 75417. Up to 9178 conditions per place. [2024-06-14 12:38:16,976 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 34 changer transitions 0/500 dead transitions. [2024-06-14 12:38:16,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 500 transitions, 10515 flow [2024-06-14 12:38:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:38:16,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:38:16,978 INFO L175 Difference]: Start difference. First operand has 245 places, 483 transitions, 9446 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:38:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 500 transitions, 10515 flow [2024-06-14 12:38:18,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 500 transitions, 10433 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:18,248 INFO L231 Difference]: Finished difference. Result has 249 places, 483 transitions, 9439 flow [2024-06-14 12:38:18,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9364, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9439, PETRI_PLACES=249, PETRI_TRANSITIONS=483} [2024-06-14 12:38:18,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 12:38:18,249 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 483 transitions, 9439 flow [2024-06-14 12:38:18,249 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 12:38:18,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:18,249 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 12:38:18,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:38:18,249 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 12:38:18,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 768374471, now seen corresponding path program 1 times [2024-06-14 12:38:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:18,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907282091] [2024-06-14 12:38:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:19,269 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 12:38:19,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:19,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907282091] [2024-06-14 12:38:19,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907282091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:19,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:19,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834804537] [2024-06-14 12:38:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:19,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:19,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 483 transitions, 9439 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 12:38:19,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:19,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:21,527 INFO L124 PetriNetUnfolderBase]: 6031/9485 cut-off events. [2024-06-14 12:38:21,527 INFO L125 PetriNetUnfolderBase]: For 375113/375113 co-relation queries the response was YES. [2024-06-14 12:38:21,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75519 conditions, 9485 events. 6031/9485 cut-off events. For 375113/375113 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61243 event pairs, 2642 based on Foata normal form. 2/9486 useless extension candidates. Maximal degree in co-relation 75402. Up to 9290 conditions per place. [2024-06-14 12:38:21,627 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 479 selfloop transitions, 14 changer transitions 0/496 dead transitions. [2024-06-14 12:38:21,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 496 transitions, 10499 flow [2024-06-14 12:38:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:38:21,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-14 12:38:21,628 INFO L175 Difference]: Start difference. First operand has 249 places, 483 transitions, 9439 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:38:21,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 496 transitions, 10499 flow [2024-06-14 12:38:22,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 496 transitions, 10395 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:38:22,898 INFO L231 Difference]: Finished difference. Result has 249 places, 485 transitions, 9410 flow [2024-06-14 12:38:22,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9335, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9410, PETRI_PLACES=249, PETRI_TRANSITIONS=485} [2024-06-14 12:38:22,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 12:38:22,899 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 485 transitions, 9410 flow [2024-06-14 12:38:22,899 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 12:38:22,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:22,899 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 12:38:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:38:22,900 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 12:38:22,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -22205584, now seen corresponding path program 1 times [2024-06-14 12:38:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135081391] [2024-06-14 12:38:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:23,445 INFO 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 12:38:23,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135081391] [2024-06-14 12:38:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135081391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424861953] [2024-06-14 12:38:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:23,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:23,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 485 transitions, 9410 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:23,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:23,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:23,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:25,384 INFO L124 PetriNetUnfolderBase]: 6068/9506 cut-off events. [2024-06-14 12:38:25,384 INFO L125 PetriNetUnfolderBase]: For 384937/384995 co-relation queries the response was YES. [2024-06-14 12:38:25,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76085 conditions, 9506 events. 6068/9506 cut-off events. For 384937/384995 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 61167 event pairs, 1931 based on Foata normal form. 58/9563 useless extension candidates. Maximal degree in co-relation 75968. Up to 8872 conditions per place. [2024-06-14 12:38:25,512 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 99 changer transitions 0/559 dead transitions. [2024-06-14 12:38:25,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 559 transitions, 11478 flow [2024-06-14 12:38:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:38:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-14 12:38:25,514 INFO L175 Difference]: Start difference. First operand has 249 places, 485 transitions, 9410 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:38:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 559 transitions, 11478 flow [2024-06-14 12:38:26,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 559 transitions, 11419 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:26,954 INFO L231 Difference]: Finished difference. Result has 255 places, 519 transitions, 10222 flow [2024-06-14 12:38:26,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10222, PETRI_PLACES=255, PETRI_TRANSITIONS=519} [2024-06-14 12:38:26,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-14 12:38:26,955 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 519 transitions, 10222 flow [2024-06-14 12:38:26,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:26,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:26,955 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 12:38:26,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:38:26,955 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 12:38:26,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1497266960, now seen corresponding path program 1 times [2024-06-14 12:38:26,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:26,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490791190] [2024-06-14 12:38:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:27,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490791190] [2024-06-14 12:38:27,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490791190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:27,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:27,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800770457] [2024-06-14 12:38:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:27,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:27,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:27,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 519 transitions, 10222 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 12:38:27,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:27,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:27,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:29,688 INFO L124 PetriNetUnfolderBase]: 6146/9629 cut-off events. [2024-06-14 12:38:29,688 INFO L125 PetriNetUnfolderBase]: For 417435/417473 co-relation queries the response was YES. [2024-06-14 12:38:29,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79266 conditions, 9629 events. 6146/9629 cut-off events. For 417435/417473 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 62009 event pairs, 2187 based on Foata normal form. 44/9672 useless extension candidates. Maximal degree in co-relation 79145. Up to 9031 conditions per place. [2024-06-14 12:38:29,820 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 458 selfloop transitions, 102 changer transitions 0/563 dead transitions. [2024-06-14 12:38:29,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 563 transitions, 12077 flow [2024-06-14 12:38:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:38:29,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:38:29,822 INFO L175 Difference]: Start difference. First operand has 255 places, 519 transitions, 10222 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:38:29,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 563 transitions, 12077 flow [2024-06-14 12:38:31,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 563 transitions, 12017 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:31,122 INFO L231 Difference]: Finished difference. Result has 261 places, 534 transitions, 10699 flow [2024-06-14 12:38:31,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10699, PETRI_PLACES=261, PETRI_TRANSITIONS=534} [2024-06-14 12:38:31,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 12:38:31,123 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 534 transitions, 10699 flow [2024-06-14 12:38:31,123 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 12:38:31,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:31,123 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 12:38:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:38:31,123 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:31,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -538414703, now seen corresponding path program 1 times [2024-06-14 12:38:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:31,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416278647] [2024-06-14 12:38:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:31,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:32,295 INFO 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 12:38:32,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:32,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416278647] [2024-06-14 12:38:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416278647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:32,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837155925] [2024-06-14 12:38:32,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:32,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:32,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 534 transitions, 10699 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:32,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:32,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:34,744 INFO L124 PetriNetUnfolderBase]: 6214/9735 cut-off events. [2024-06-14 12:38:34,744 INFO L125 PetriNetUnfolderBase]: For 442730/442750 co-relation queries the response was YES. [2024-06-14 12:38:34,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80776 conditions, 9735 events. 6214/9735 cut-off events. For 442730/442750 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 62705 event pairs, 2018 based on Foata normal form. 36/9770 useless extension candidates. Maximal degree in co-relation 80653. Up to 8900 conditions per place. [2024-06-14 12:38:34,866 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 432 selfloop transitions, 141 changer transitions 0/576 dead transitions. [2024-06-14 12:38:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 576 transitions, 12105 flow [2024-06-14 12:38:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:38:34,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-14 12:38:34,867 INFO L175 Difference]: Start difference. First operand has 261 places, 534 transitions, 10699 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:38:34,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 576 transitions, 12105 flow [2024-06-14 12:38:36,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 576 transitions, 11939 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:36,323 INFO L231 Difference]: Finished difference. Result has 267 places, 536 transitions, 10912 flow [2024-06-14 12:38:36,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10533, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10912, PETRI_PLACES=267, PETRI_TRANSITIONS=536} [2024-06-14 12:38:36,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 12:38:36,323 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 536 transitions, 10912 flow [2024-06-14 12:38:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:36,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:36,324 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 12:38:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:38:36,324 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:36,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1224204697, now seen corresponding path program 2 times [2024-06-14 12:38:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625186947] [2024-06-14 12:38:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625186947] [2024-06-14 12:38:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625186947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:37,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:37,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563596104] [2024-06-14 12:38:37,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:37,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:37,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:37,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 536 transitions, 10912 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:37,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:37,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:37,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:40,113 INFO L124 PetriNetUnfolderBase]: 6282/9852 cut-off events. [2024-06-14 12:38:40,113 INFO L125 PetriNetUnfolderBase]: For 467201/467239 co-relation queries the response was YES. [2024-06-14 12:38:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82143 conditions, 9852 events. 6282/9852 cut-off events. For 467201/467239 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 63711 event pairs, 2011 based on Foata normal form. 54/9905 useless extension candidates. Maximal degree in co-relation 82019. Up to 8982 conditions per place. [2024-06-14 12:38:40,242 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 149 changer transitions 0/580 dead transitions. [2024-06-14 12:38:40,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 580 transitions, 12356 flow [2024-06-14 12:38:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:38:40,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 12:38:40,244 INFO L175 Difference]: Start difference. First operand has 267 places, 536 transitions, 10912 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:38:40,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 580 transitions, 12356 flow [2024-06-14 12:38:41,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 580 transitions, 12070 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:38:41,738 INFO L231 Difference]: Finished difference. Result has 271 places, 540 transitions, 11098 flow [2024-06-14 12:38:41,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10626, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11098, PETRI_PLACES=271, PETRI_TRANSITIONS=540} [2024-06-14 12:38:41,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 12:38:41,739 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 540 transitions, 11098 flow [2024-06-14 12:38:41,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:41,739 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 12:38:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:38:41,739 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:41,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1223974057, now seen corresponding path program 3 times [2024-06-14 12:38:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207845053] [2024-06-14 12:38:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:42,851 INFO 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 12:38:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207845053] [2024-06-14 12:38:42,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207845053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:42,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:42,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:42,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111339920] [2024-06-14 12:38:42,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:42,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:42,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:42,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:42,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 540 transitions, 11098 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:42,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:42,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:42,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:45,572 INFO L124 PetriNetUnfolderBase]: 6289/9870 cut-off events. [2024-06-14 12:38:45,572 INFO L125 PetriNetUnfolderBase]: For 473512/473550 co-relation queries the response was YES. [2024-06-14 12:38:45,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82145 conditions, 9870 events. 6289/9870 cut-off events. For 473512/473550 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 63991 event pairs, 2007 based on Foata normal form. 54/9923 useless extension candidates. Maximal degree in co-relation 82019. Up to 8866 conditions per place. [2024-06-14 12:38:45,678 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 149 changer transitions 0/580 dead transitions. [2024-06-14 12:38:45,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 580 transitions, 12468 flow [2024-06-14 12:38:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:38:45,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:38:45,680 INFO L175 Difference]: Start difference. First operand has 271 places, 540 transitions, 11098 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:38:45,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 580 transitions, 12468 flow [2024-06-14 12:38:47,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 580 transitions, 12244 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:47,057 INFO L231 Difference]: Finished difference. Result has 275 places, 541 transitions, 11235 flow [2024-06-14 12:38:47,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10874, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11235, PETRI_PLACES=275, PETRI_TRANSITIONS=541} [2024-06-14 12:38:47,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 12:38:47,058 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 541 transitions, 11235 flow [2024-06-14 12:38:47,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:47,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:47,058 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 12:38:47,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:38:47,058 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 12:38:47,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:47,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1936219398, now seen corresponding path program 2 times [2024-06-14 12:38:47,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:47,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327581797] [2024-06-14 12:38:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:47,679 INFO 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 12:38:47,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327581797] [2024-06-14 12:38:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327581797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:47,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:47,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623920708] [2024-06-14 12:38:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:47,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:47,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:47,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 541 transitions, 11235 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 12:38:47,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:47,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:47,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:49,989 INFO L124 PetriNetUnfolderBase]: 6265/9841 cut-off events. [2024-06-14 12:38:49,989 INFO L125 PetriNetUnfolderBase]: For 467112/467150 co-relation queries the response was YES. [2024-06-14 12:38:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81608 conditions, 9841 events. 6265/9841 cut-off events. For 467112/467150 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 63982 event pairs, 2244 based on Foata normal form. 46/9886 useless extension candidates. Maximal degree in co-relation 81481. Up to 9260 conditions per place. [2024-06-14 12:38:50,117 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 460 selfloop transitions, 101 changer transitions 0/564 dead transitions. [2024-06-14 12:38:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 564 transitions, 12657 flow [2024-06-14 12:38:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:38:50,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:38:50,118 INFO L175 Difference]: Start difference. First operand has 275 places, 541 transitions, 11235 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:38:50,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 564 transitions, 12657 flow [2024-06-14 12:38:51,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 564 transitions, 12264 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:51,655 INFO L231 Difference]: Finished difference. Result has 275 places, 541 transitions, 11064 flow [2024-06-14 12:38:51,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10842, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11064, PETRI_PLACES=275, PETRI_TRANSITIONS=541} [2024-06-14 12:38:51,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 12:38:51,656 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 541 transitions, 11064 flow [2024-06-14 12:38:51,656 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 12:38:51,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:51,656 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 12:38:51,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:38:51,656 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 12:38:51,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash 793139984, now seen corresponding path program 2 times [2024-06-14 12:38:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660328523] [2024-06-14 12:38:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:52,424 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 12:38:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660328523] [2024-06-14 12:38:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660328523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:52,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:52,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593355625] [2024-06-14 12:38:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:52,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:52,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 541 transitions, 11064 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 12:38:52,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:52,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:52,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:54,976 INFO L124 PetriNetUnfolderBase]: 6367/9979 cut-off events. [2024-06-14 12:38:54,976 INFO L125 PetriNetUnfolderBase]: For 476589/476621 co-relation queries the response was YES. [2024-06-14 12:38:55,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82534 conditions, 9979 events. 6367/9979 cut-off events. For 476589/476621 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64842 event pairs, 2247 based on Foata normal form. 38/10016 useless extension candidates. Maximal degree in co-relation 82406. Up to 9295 conditions per place. [2024-06-14 12:38:55,094 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 467 selfloop transitions, 132 changer transitions 0/602 dead transitions. [2024-06-14 12:38:55,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 602 transitions, 13082 flow [2024-06-14 12:38:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:38:55,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-14 12:38:55,095 INFO L175 Difference]: Start difference. First operand has 275 places, 541 transitions, 11064 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:38:55,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 602 transitions, 13082 flow [2024-06-14 12:38:56,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 602 transitions, 12929 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:56,588 INFO L231 Difference]: Finished difference. Result has 280 places, 566 transitions, 11620 flow [2024-06-14 12:38:56,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10917, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=280, PETRI_TRANSITIONS=566} [2024-06-14 12:38:56,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-14 12:38:56,589 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 566 transitions, 11620 flow [2024-06-14 12:38:56,589 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 12:38:56,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:56,589 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 12:38:56,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:38:56,589 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 12:38:56,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1969283440, now seen corresponding path program 3 times [2024-06-14 12:38:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456580608] [2024-06-14 12:38:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:56,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:57,371 INFO 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 12:38:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456580608] [2024-06-14 12:38:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456580608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:57,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:57,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:57,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203532863] [2024-06-14 12:38:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:57,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:57,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:57,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 566 transitions, 11620 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 12:38:57,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:57,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:57,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:59,736 INFO L124 PetriNetUnfolderBase]: 6363/9976 cut-off events. [2024-06-14 12:38:59,736 INFO L125 PetriNetUnfolderBase]: For 475611/475665 co-relation queries the response was YES. [2024-06-14 12:38:59,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83563 conditions, 9976 events. 6363/9976 cut-off events. For 475611/475665 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64845 event pairs, 2234 based on Foata normal form. 56/10031 useless extension candidates. Maximal degree in co-relation 83434. Up to 9532 conditions per place. [2024-06-14 12:38:59,873 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 81 changer transitions 0/593 dead transitions. [2024-06-14 12:38:59,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 593 transitions, 13172 flow [2024-06-14 12:38:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:38:59,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 12:38:59,874 INFO L175 Difference]: Start difference. First operand has 280 places, 566 transitions, 11620 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:38:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 593 transitions, 13172 flow [2024-06-14 12:39:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 593 transitions, 12964 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:01,243 INFO L231 Difference]: Finished difference. Result has 286 places, 571 transitions, 11689 flow [2024-06-14 12:39:01,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11416, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11689, PETRI_PLACES=286, PETRI_TRANSITIONS=571} [2024-06-14 12:39:01,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:39:01,245 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 571 transitions, 11689 flow [2024-06-14 12:39:01,245 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 12:39:01,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:01,245 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 12:39:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:39:01,245 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 12:39:01,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1692363440, now seen corresponding path program 4 times [2024-06-14 12:39:01,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:01,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556080023] [2024-06-14 12:39:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:02,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:02,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556080023] [2024-06-14 12:39:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556080023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:02,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:02,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716513992] [2024-06-14 12:39:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:02,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:02,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:02,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:02,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 571 transitions, 11689 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 12:39:02,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:02,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:02,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:04,505 INFO L124 PetriNetUnfolderBase]: 6425/10062 cut-off events. [2024-06-14 12:39:04,505 INFO L125 PetriNetUnfolderBase]: For 499810/499842 co-relation queries the response was YES. [2024-06-14 12:39:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84783 conditions, 10062 events. 6425/10062 cut-off events. For 499810/499842 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 65430 event pairs, 2219 based on Foata normal form. 38/10099 useless extension candidates. Maximal degree in co-relation 84651. Up to 9103 conditions per place. [2024-06-14 12:39:04,634 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 198 changer transitions 0/618 dead transitions. [2024-06-14 12:39:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 618 transitions, 13509 flow [2024-06-14 12:39:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:39:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-14 12:39:04,636 INFO L175 Difference]: Start difference. First operand has 286 places, 571 transitions, 11689 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:39:04,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 618 transitions, 13509 flow [2024-06-14 12:39:06,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 618 transitions, 13355 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:06,216 INFO L231 Difference]: Finished difference. Result has 291 places, 584 transitions, 12254 flow [2024-06-14 12:39:06,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11537, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12254, PETRI_PLACES=291, PETRI_TRANSITIONS=584} [2024-06-14 12:39:06,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 12:39:06,217 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 584 transitions, 12254 flow [2024-06-14 12:39:06,217 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 12:39:06,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:06,217 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 12:39:06,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:39:06,217 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 12:39:06,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash -792785138, now seen corresponding path program 3 times [2024-06-14 12:39:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:06,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28474724] [2024-06-14 12:39:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:06,925 INFO 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 12:39:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28474724] [2024-06-14 12:39:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28474724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:06,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:06,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:06,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203626628] [2024-06-14 12:39:06,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:06,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:06,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:06,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 584 transitions, 12254 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 12:39:06,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:06,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:09,468 INFO L124 PetriNetUnfolderBase]: 6509/10183 cut-off events. [2024-06-14 12:39:09,468 INFO L125 PetriNetUnfolderBase]: For 541661/541715 co-relation queries the response was YES. [2024-06-14 12:39:09,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87965 conditions, 10183 events. 6509/10183 cut-off events. For 541661/541715 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 66244 event pairs, 2292 based on Foata normal form. 66/10248 useless extension candidates. Maximal degree in co-relation 87831. Up to 9398 conditions per place. [2024-06-14 12:39:09,589 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 152 changer transitions 0/633 dead transitions. [2024-06-14 12:39:09,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 633 transitions, 14432 flow [2024-06-14 12:39:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:39:09,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:39:09,590 INFO L175 Difference]: Start difference. First operand has 291 places, 584 transitions, 12254 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:39:09,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 633 transitions, 14432 flow [2024-06-14 12:39:11,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 633 transitions, 14062 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:11,421 INFO L231 Difference]: Finished difference. Result has 294 places, 606 transitions, 12820 flow [2024-06-14 12:39:11,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11918, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12820, PETRI_PLACES=294, PETRI_TRANSITIONS=606} [2024-06-14 12:39:11,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 12:39:11,421 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 606 transitions, 12820 flow [2024-06-14 12:39:11,422 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 12:39:11,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:11,422 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 12:39:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:39:11,422 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 12:39:11,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -787071218, now seen corresponding path program 4 times [2024-06-14 12:39:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:11,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223375285] [2024-06-14 12:39:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:11,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:12,053 INFO 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 12:39:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223375285] [2024-06-14 12:39:12,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223375285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:12,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:12,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:12,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055855724] [2024-06-14 12:39:12,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:12,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:12,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:12,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:12,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 606 transitions, 12820 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 12:39:12,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:12,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:12,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:14,329 INFO L124 PetriNetUnfolderBase]: 6491/10155 cut-off events. [2024-06-14 12:39:14,329 INFO L125 PetriNetUnfolderBase]: For 517030/517084 co-relation queries the response was YES. [2024-06-14 12:39:14,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87085 conditions, 10155 events. 6491/10155 cut-off events. For 517030/517084 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 65960 event pairs, 2229 based on Foata normal form. 60/10214 useless extension candidates. Maximal degree in co-relation 86948. Up to 9387 conditions per place. [2024-06-14 12:39:14,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 139 changer transitions 0/630 dead transitions. [2024-06-14 12:39:14,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 630 transitions, 14431 flow [2024-06-14 12:39:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:39:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:39:14,472 INFO L175 Difference]: Start difference. First operand has 294 places, 606 transitions, 12820 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:39:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 630 transitions, 14431 flow [2024-06-14 12:39:16,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 630 transitions, 14201 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:16,094 INFO L231 Difference]: Finished difference. Result has 297 places, 606 transitions, 12906 flow [2024-06-14 12:39:16,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12594, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12906, PETRI_PLACES=297, PETRI_TRANSITIONS=606} [2024-06-14 12:39:16,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 12:39:16,094 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 606 transitions, 12906 flow [2024-06-14 12:39:16,095 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 12:39:16,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,095 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 12:39:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:39:16,095 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 12:39:16,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1512458627, now seen corresponding path program 4 times [2024-06-14 12:39:16,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844869694] [2024-06-14 12:39:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:17,210 INFO 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 12:39:17,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844869694] [2024-06-14 12:39:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844869694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:17,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:17,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:39:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849115957] [2024-06-14 12:39:17,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:39:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:39:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:39:17,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:17,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 606 transitions, 12906 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:17,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:19,791 INFO L124 PetriNetUnfolderBase]: 6613/10375 cut-off events. [2024-06-14 12:39:19,791 INFO L125 PetriNetUnfolderBase]: For 558828/558882 co-relation queries the response was YES. [2024-06-14 12:39:19,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88821 conditions, 10375 events. 6613/10375 cut-off events. For 558828/558882 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 67909 event pairs, 2038 based on Foata normal form. 82/10456 useless extension candidates. Maximal degree in co-relation 88684. Up to 9248 conditions per place. [2024-06-14 12:39:19,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 491 selfloop transitions, 157 changer transitions 0/651 dead transitions. [2024-06-14 12:39:19,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 651 transitions, 14649 flow [2024-06-14 12:39:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:39:19,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:39:19,931 INFO L175 Difference]: Start difference. First operand has 297 places, 606 transitions, 12906 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:39:19,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 651 transitions, 14649 flow [2024-06-14 12:39:21,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 651 transitions, 14429 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:21,827 INFO L231 Difference]: Finished difference. Result has 301 places, 610 transitions, 13205 flow [2024-06-14 12:39:21,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12686, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13205, PETRI_PLACES=301, PETRI_TRANSITIONS=610} [2024-06-14 12:39:21,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 12:39:21,827 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 610 transitions, 13205 flow [2024-06-14 12:39:21,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:21,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:21,828 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 12:39:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:39:21,828 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:21,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1552697815, now seen corresponding path program 5 times [2024-06-14 12:39:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554124187] [2024-06-14 12:39:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:21,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:22,937 INFO 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 12:39:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554124187] [2024-06-14 12:39:22,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554124187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:22,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:22,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:39:22,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648890612] [2024-06-14 12:39:22,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:22,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:39:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:39:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:39:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:23,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 610 transitions, 13205 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:25,596 INFO L124 PetriNetUnfolderBase]: 6735/10581 cut-off events. [2024-06-14 12:39:25,596 INFO L125 PetriNetUnfolderBase]: For 580286/580340 co-relation queries the response was YES. [2024-06-14 12:39:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90952 conditions, 10581 events. 6735/10581 cut-off events. For 580286/580340 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 69669 event pairs, 2006 based on Foata normal form. 82/10662 useless extension candidates. Maximal degree in co-relation 90815. Up to 9021 conditions per place. [2024-06-14 12:39:25,749 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 187 changer transitions 0/652 dead transitions. [2024-06-14 12:39:25,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 652 transitions, 14899 flow [2024-06-14 12:39:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:39:25,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:39:25,751 INFO L175 Difference]: Start difference. First operand has 301 places, 610 transitions, 13205 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:39:25,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 652 transitions, 14899 flow [2024-06-14 12:39:27,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 652 transitions, 14535 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:27,492 INFO L231 Difference]: Finished difference. Result has 304 places, 614 transitions, 13428 flow [2024-06-14 12:39:27,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12843, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13428, PETRI_PLACES=304, PETRI_TRANSITIONS=614} [2024-06-14 12:39:27,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 12:39:27,493 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 614 transitions, 13428 flow [2024-06-14 12:39:27,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:27,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:27,493 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 12:39:27,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:39:27,493 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:27,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1725418345, now seen corresponding path program 6 times [2024-06-14 12:39:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714833221] [2024-06-14 12:39:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:28,574 INFO 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 12:39:28,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:28,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714833221] [2024-06-14 12:39:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714833221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:28,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:39:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672636270] [2024-06-14 12:39:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:39:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:39:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:39:28,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:28,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 614 transitions, 13428 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:28,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:28,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:28,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:31,250 INFO L124 PetriNetUnfolderBase]: 6857/10765 cut-off events. [2024-06-14 12:39:31,250 INFO L125 PetriNetUnfolderBase]: For 579119/579151 co-relation queries the response was YES. [2024-06-14 12:39:31,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92542 conditions, 10765 events. 6857/10765 cut-off events. For 579119/579151 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 71038 event pairs, 2152 based on Foata normal form. 60/10824 useless extension candidates. Maximal degree in co-relation 92404. Up to 9650 conditions per place. [2024-06-14 12:39:31,413 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 168 changer transitions 0/662 dead transitions. [2024-06-14 12:39:31,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 662 transitions, 15228 flow [2024-06-14 12:39:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:39:31,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:39:31,414 INFO L175 Difference]: Start difference. First operand has 304 places, 614 transitions, 13428 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:39:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 662 transitions, 15228 flow [2024-06-14 12:39:33,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 662 transitions, 14732 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:33,330 INFO L231 Difference]: Finished difference. Result has 306 places, 618 transitions, 13488 flow [2024-06-14 12:39:33,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12934, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13488, PETRI_PLACES=306, PETRI_TRANSITIONS=618} [2024-06-14 12:39:33,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 12:39:33,331 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 618 transitions, 13488 flow [2024-06-14 12:39:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:33,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:33,332 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 12:39:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:39:33,332 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 12:39:33,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash -787075186, now seen corresponding path program 5 times [2024-06-14 12:39:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:33,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759708039] [2024-06-14 12:39:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:33,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:34,186 INFO 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 12:39:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759708039] [2024-06-14 12:39:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759708039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:34,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399090393] [2024-06-14 12:39:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:34,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:34,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 618 transitions, 13488 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 12:39:34,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:36,876 INFO L124 PetriNetUnfolderBase]: 6885/10815 cut-off events. [2024-06-14 12:39:36,876 INFO L125 PetriNetUnfolderBase]: For 543695/543749 co-relation queries the response was YES. [2024-06-14 12:39:36,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91837 conditions, 10815 events. 6885/10815 cut-off events. For 543695/543749 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 71641 event pairs, 2481 based on Foata normal form. 64/10878 useless extension candidates. Maximal degree in co-relation 91698. Up to 9994 conditions per place. [2024-06-14 12:39:37,021 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 490 selfloop transitions, 158 changer transitions 0/651 dead transitions. [2024-06-14 12:39:37,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 651 transitions, 15262 flow [2024-06-14 12:39:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:39:37,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:39:37,023 INFO L175 Difference]: Start difference. First operand has 306 places, 618 transitions, 13488 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:39:37,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 651 transitions, 15262 flow [2024-06-14 12:39:38,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 651 transitions, 14783 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:38,940 INFO L231 Difference]: Finished difference. Result has 308 places, 626 transitions, 13494 flow [2024-06-14 12:39:38,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13013, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13494, PETRI_PLACES=308, PETRI_TRANSITIONS=626} [2024-06-14 12:39:38,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 12:39:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 626 transitions, 13494 flow [2024-06-14 12:39:38,941 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 12:39:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:38,941 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 12:39:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:39:38,941 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 12:39:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 403967694, now seen corresponding path program 5 times [2024-06-14 12:39:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:38,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317992213] [2024-06-14 12:39:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:38,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:39,526 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 12:39:39,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:39,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317992213] [2024-06-14 12:39:39,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317992213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:39,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:39,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393889727] [2024-06-14 12:39:39,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:39,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:39,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 626 transitions, 13494 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 12:39:39,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:39,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:39,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:42,281 INFO L124 PetriNetUnfolderBase]: 6843/10756 cut-off events. [2024-06-14 12:39:42,282 INFO L125 PetriNetUnfolderBase]: For 517816/517816 co-relation queries the response was YES. [2024-06-14 12:39:42,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90134 conditions, 10756 events. 6843/10756 cut-off events. For 517816/517816 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 71134 event pairs, 2988 based on Foata normal form. 6/10761 useless extension candidates. Maximal degree in co-relation 89994. Up to 10531 conditions per place. [2024-06-14 12:39:42,419 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 36 changer transitions 0/647 dead transitions. [2024-06-14 12:39:42,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 647 transitions, 15027 flow [2024-06-14 12:39:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:39:42,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:39:42,420 INFO L175 Difference]: Start difference. First operand has 308 places, 626 transitions, 13494 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:39:42,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 647 transitions, 15027 flow [2024-06-14 12:39:44,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 647 transitions, 14611 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:44,172 INFO L231 Difference]: Finished difference. Result has 309 places, 626 transitions, 13164 flow [2024-06-14 12:39:44,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13078, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13164, PETRI_PLACES=309, PETRI_TRANSITIONS=626} [2024-06-14 12:39:44,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-14 12:39:44,172 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 626 transitions, 13164 flow [2024-06-14 12:39:44,173 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 12:39:44,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:44,173 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 12:39:44,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:39:44,173 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 12:39:44,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:44,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224212, now seen corresponding path program 6 times [2024-06-14 12:39:44,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:44,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823060263] [2024-06-14 12:39:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:44,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:44,732 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 12:39:44,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:44,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823060263] [2024-06-14 12:39:44,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823060263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:44,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:44,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:44,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876127627] [2024-06-14 12:39:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:44,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:44,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 626 transitions, 13164 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 12:39:44,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:44,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:44,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:47,247 INFO L124 PetriNetUnfolderBase]: 6858/10776 cut-off events. [2024-06-14 12:39:47,247 INFO L125 PetriNetUnfolderBase]: For 520700/520700 co-relation queries the response was YES. [2024-06-14 12:39:47,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89866 conditions, 10776 events. 6858/10776 cut-off events. For 520700/520700 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 71231 event pairs, 2994 based on Foata normal form. 3/10778 useless extension candidates. Maximal degree in co-relation 89725. Up to 10588 conditions per place. [2024-06-14 12:39:47,405 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 22 changer transitions 0/646 dead transitions. [2024-06-14 12:39:47,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 646 transitions, 14657 flow [2024-06-14 12:39:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:39:47,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:39:47,406 INFO L175 Difference]: Start difference. First operand has 309 places, 626 transitions, 13164 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:39:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 646 transitions, 14657 flow [2024-06-14 12:39:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 646 transitions, 14107 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 12:39:49,467 INFO L231 Difference]: Finished difference. Result has 307 places, 632 transitions, 12815 flow [2024-06-14 12:39:49,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12640, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12815, PETRI_PLACES=307, PETRI_TRANSITIONS=632} [2024-06-14 12:39:49,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 12:39:49,468 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 632 transitions, 12815 flow [2024-06-14 12:39:49,468 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 12:39:49,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:49,469 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 12:39:49,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:39:49,469 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 12:39:49,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash -249963856, now seen corresponding path program 7 times [2024-06-14 12:39:49,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189555177] [2024-06-14 12:39:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:50,063 INFO 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 12:39:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189555177] [2024-06-14 12:39:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189555177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493768253] [2024-06-14 12:39:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:50,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:50,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 632 transitions, 12815 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 12:39:50,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:50,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:50,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:52,533 INFO L124 PetriNetUnfolderBase]: 6840/10754 cut-off events. [2024-06-14 12:39:52,533 INFO L125 PetriNetUnfolderBase]: For 519098/519100 co-relation queries the response was YES. [2024-06-14 12:39:52,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89049 conditions, 10754 events. 6840/10754 cut-off events. For 519098/519100 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 71146 event pairs, 2984 based on Foata normal form. 8/10761 useless extension candidates. Maximal degree in co-relation 88909. Up to 10472 conditions per place. [2024-06-14 12:39:52,685 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 606 selfloop transitions, 39 changer transitions 0/648 dead transitions. [2024-06-14 12:39:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 648 transitions, 14316 flow [2024-06-14 12:39:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:39:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:39:52,686 INFO L175 Difference]: Start difference. First operand has 307 places, 632 transitions, 12815 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:39:52,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 648 transitions, 14316 flow [2024-06-14 12:39:54,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 648 transitions, 14212 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:54,652 INFO L231 Difference]: Finished difference. Result has 310 places, 632 transitions, 12802 flow [2024-06-14 12:39:54,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12711, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12802, PETRI_PLACES=310, PETRI_TRANSITIONS=632} [2024-06-14 12:39:54,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 12:39:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 632 transitions, 12802 flow [2024-06-14 12:39:54,653 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 12:39:54,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:54,653 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 12:39:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:39:54,653 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 12:39:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1610862350, now seen corresponding path program 8 times [2024-06-14 12:39:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844706970] [2024-06-14 12:39:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:55,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844706970] [2024-06-14 12:39:55,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844706970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:55,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:55,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531652277] [2024-06-14 12:39:55,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:55,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:55,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:55,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:55,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 632 transitions, 12802 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 12:39:55,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:55,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:57,834 INFO L124 PetriNetUnfolderBase]: 6825/10733 cut-off events. [2024-06-14 12:39:57,834 INFO L125 PetriNetUnfolderBase]: For 520556/520558 co-relation queries the response was YES. [2024-06-14 12:39:57,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88902 conditions, 10733 events. 6825/10733 cut-off events. For 520556/520558 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 70958 event pairs, 2994 based on Foata normal form. 5/10737 useless extension candidates. Maximal degree in co-relation 88761. Up to 10543 conditions per place. [2024-06-14 12:39:57,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 22 changer transitions 0/643 dead transitions. [2024-06-14 12:39:57,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 643 transitions, 14132 flow [2024-06-14 12:39:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:39:57,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-14 12:39:57,981 INFO L175 Difference]: Start difference. First operand has 310 places, 632 transitions, 12802 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:39:57,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 643 transitions, 14132 flow [2024-06-14 12:39:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 643 transitions, 14028 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:59,856 INFO L231 Difference]: Finished difference. Result has 313 places, 632 transitions, 12750 flow [2024-06-14 12:39:59,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12698, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12750, PETRI_PLACES=313, PETRI_TRANSITIONS=632} [2024-06-14 12:39:59,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 12:39:59,857 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 632 transitions, 12750 flow [2024-06-14 12:39:59,857 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 12:39:59,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:59,857 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 12:39:59,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:39:59,857 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:59,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1856445593, now seen corresponding path program 7 times [2024-06-14 12:39:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044497407] [2024-06-14 12:39:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044497407] [2024-06-14 12:40:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044497407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:01,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:40:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41926898] [2024-06-14 12:40:01,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:40:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:40:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:40:01,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:01,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 632 transitions, 12750 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:01,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:01,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:01,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:03,900 INFO L124 PetriNetUnfolderBase]: 6947/10929 cut-off events. [2024-06-14 12:40:03,901 INFO L125 PetriNetUnfolderBase]: For 563413/563445 co-relation queries the response was YES. [2024-06-14 12:40:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90427 conditions, 10929 events. 6947/10929 cut-off events. For 563413/563445 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 72490 event pairs, 2088 based on Foata normal form. 60/10988 useless extension candidates. Maximal degree in co-relation 90285. Up to 9240 conditions per place. [2024-06-14 12:40:04,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 174 changer transitions 0/671 dead transitions. [2024-06-14 12:40:04,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 671 transitions, 14478 flow [2024-06-14 12:40:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:40:04,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:40:04,076 INFO L175 Difference]: Start difference. First operand has 313 places, 632 transitions, 12750 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:40:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 671 transitions, 14478 flow [2024-06-14 12:40:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 671 transitions, 14366 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:40:06,063 INFO L231 Difference]: Finished difference. Result has 313 places, 636 transitions, 13221 flow [2024-06-14 12:40:06,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12638, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13221, PETRI_PLACES=313, PETRI_TRANSITIONS=636} [2024-06-14 12:40:06,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 12:40:06,064 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 636 transitions, 13221 flow [2024-06-14 12:40:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:06,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:06,064 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 12:40:06,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:40:06,065 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:06,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1856214953, now seen corresponding path program 8 times [2024-06-14 12:40:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:06,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692820339] [2024-06-14 12:40:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:07,218 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 12:40:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:07,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692820339] [2024-06-14 12:40:07,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692820339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:07,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:07,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:40:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92813611] [2024-06-14 12:40:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:40:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:40:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:40:07,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:07,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 636 transitions, 13221 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:07,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:07,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:07,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:10,010 INFO L124 PetriNetUnfolderBase]: 6983/11017 cut-off events. [2024-06-14 12:40:10,010 INFO L125 PetriNetUnfolderBase]: For 586559/586613 co-relation queries the response was YES. [2024-06-14 12:40:10,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90334 conditions, 11017 events. 6983/11017 cut-off events. For 586559/586613 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 73584 event pairs, 1960 based on Foata normal form. 106/11122 useless extension candidates. Maximal degree in co-relation 90191. Up to 8852 conditions per place. [2024-06-14 12:40:10,183 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 454 selfloop transitions, 212 changer transitions 0/669 dead transitions. [2024-06-14 12:40:10,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 669 transitions, 14769 flow [2024-06-14 12:40:10,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:40:10,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:40:10,185 INFO L175 Difference]: Start difference. First operand has 313 places, 636 transitions, 13221 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:40:10,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 669 transitions, 14769 flow [2024-06-14 12:40:12,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 669 transitions, 14277 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:12,220 INFO L231 Difference]: Finished difference. Result has 315 places, 639 transitions, 13270 flow [2024-06-14 12:40:12,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12729, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13270, PETRI_PLACES=315, PETRI_TRANSITIONS=639} [2024-06-14 12:40:12,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 12:40:12,221 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 639 transitions, 13270 flow [2024-06-14 12:40:12,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:12,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:12,222 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 12:40:12,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:40:12,222 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 12:40:12,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1800102921, now seen corresponding path program 9 times [2024-06-14 12:40:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:12,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647222515] [2024-06-14 12:40:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:12,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:13,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:13,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647222515] [2024-06-14 12:40:13,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647222515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:13,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:13,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054836611] [2024-06-14 12:40:13,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:13,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:13,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:13,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 639 transitions, 13270 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:13,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:13,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:13,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:15,960 INFO L124 PetriNetUnfolderBase]: 6937/10929 cut-off events. [2024-06-14 12:40:15,960 INFO L125 PetriNetUnfolderBase]: For 477980/478012 co-relation queries the response was YES. [2024-06-14 12:40:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88129 conditions, 10929 events. 6937/10929 cut-off events. For 477980/478012 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 72748 event pairs, 1986 based on Foata normal form. 54/10982 useless extension candidates. Maximal degree in co-relation 87985. Up to 9026 conditions per place. [2024-06-14 12:40:16,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 478 selfloop transitions, 194 changer transitions 0/675 dead transitions. [2024-06-14 12:40:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 675 transitions, 14820 flow [2024-06-14 12:40:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:40:16,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:40:16,107 INFO L175 Difference]: Start difference. First operand has 315 places, 639 transitions, 13270 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:40:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 675 transitions, 14820 flow [2024-06-14 12:40:18,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 675 transitions, 14253 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:18,383 INFO L231 Difference]: Finished difference. Result has 317 places, 639 transitions, 13121 flow [2024-06-14 12:40:18,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12703, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13121, PETRI_PLACES=317, PETRI_TRANSITIONS=639} [2024-06-14 12:40:18,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 12:40:18,383 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 639 transitions, 13121 flow [2024-06-14 12:40:18,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:18,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:18,384 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 12:40:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:40:18,384 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:18,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2085433431, now seen corresponding path program 10 times [2024-06-14 12:40:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024738062] [2024-06-14 12:40:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:19,589 INFO 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 12:40:19,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:19,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024738062] [2024-06-14 12:40:19,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024738062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:19,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:19,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:40:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924843128] [2024-06-14 12:40:19,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:19,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:40:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:40:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:40:19,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 639 transitions, 13121 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:19,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:19,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:19,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:22,225 INFO L124 PetriNetUnfolderBase]: 6917/10887 cut-off events. [2024-06-14 12:40:22,225 INFO L125 PetriNetUnfolderBase]: For 441231/441233 co-relation queries the response was YES. [2024-06-14 12:40:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86588 conditions, 10887 events. 6917/10887 cut-off events. For 441231/441233 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 72264 event pairs, 3032 based on Foata normal form. 12/10898 useless extension candidates. Maximal degree in co-relation 86443. Up to 10586 conditions per place. [2024-06-14 12:40:22,388 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 644 selfloop transitions, 19 changer transitions 0/666 dead transitions. [2024-06-14 12:40:22,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 666 transitions, 14505 flow [2024-06-14 12:40:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:40:22,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:40:22,389 INFO L175 Difference]: Start difference. First operand has 317 places, 639 transitions, 13121 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:40:22,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 666 transitions, 14505 flow [2024-06-14 12:40:24,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 666 transitions, 14081 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:24,574 INFO L231 Difference]: Finished difference. Result has 317 places, 638 transitions, 12669 flow [2024-06-14 12:40:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12627, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12669, PETRI_PLACES=317, PETRI_TRANSITIONS=638} [2024-06-14 12:40:24,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 12:40:24,575 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 638 transitions, 12669 flow [2024-06-14 12:40:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:24,575 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 12:40:24,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:40:24,576 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 12:40:24,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1618042973, now seen corresponding path program 1 times [2024-06-14 12:40:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107824819] [2024-06-14 12:40:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107824819] [2024-06-14 12:40:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107824819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:25,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:25,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:25,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29218552] [2024-06-14 12:40:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:25,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:25,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 638 transitions, 12669 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 12:40:25,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:25,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:25,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:28,090 INFO L124 PetriNetUnfolderBase]: 6925/10921 cut-off events. [2024-06-14 12:40:28,090 INFO L125 PetriNetUnfolderBase]: For 411349/411351 co-relation queries the response was YES. [2024-06-14 12:40:28,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85008 conditions, 10921 events. 6925/10921 cut-off events. For 411349/411351 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 72950 event pairs, 3043 based on Foata normal form. 6/10926 useless extension candidates. Maximal degree in co-relation 84863. Up to 10661 conditions per place. [2024-06-14 12:40:28,229 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 35 changer transitions 0/660 dead transitions. [2024-06-14 12:40:28,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 660 transitions, 14315 flow [2024-06-14 12:40:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:40:28,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-14 12:40:28,230 INFO L175 Difference]: Start difference. First operand has 317 places, 638 transitions, 12669 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:40:28,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 660 transitions, 14315 flow [2024-06-14 12:40:30,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 660 transitions, 14075 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:30,089 INFO L231 Difference]: Finished difference. Result has 320 places, 646 transitions, 12697 flow [2024-06-14 12:40:30,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12429, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12697, PETRI_PLACES=320, PETRI_TRANSITIONS=646} [2024-06-14 12:40:30,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 12:40:30,090 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 646 transitions, 12697 flow [2024-06-14 12:40:30,090 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 12:40:30,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:30,090 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 12:40:30,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:40:30,090 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 12:40:30,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1963554362, now seen corresponding path program 6 times [2024-06-14 12:40:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:30,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975072229] [2024-06-14 12:40:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:30,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:30,961 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 12:40:30,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:30,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975072229] [2024-06-14 12:40:30,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975072229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:30,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:30,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288366559] [2024-06-14 12:40:30,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:31,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:31,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 646 transitions, 12697 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 12:40:31,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:31,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:31,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:33,428 INFO L124 PetriNetUnfolderBase]: 6907/10897 cut-off events. [2024-06-14 12:40:33,428 INFO L125 PetriNetUnfolderBase]: For 418470/418472 co-relation queries the response was YES. [2024-06-14 12:40:33,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83640 conditions, 10897 events. 6907/10897 cut-off events. For 418470/418472 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 72818 event pairs, 3052 based on Foata normal form. 8/10904 useless extension candidates. Maximal degree in co-relation 83494. Up to 10603 conditions per place. [2024-06-14 12:40:33,584 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 609 selfloop transitions, 51 changer transitions 0/663 dead transitions. [2024-06-14 12:40:33,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 663 transitions, 14116 flow [2024-06-14 12:40:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:40:33,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:40:33,585 INFO L175 Difference]: Start difference. First operand has 320 places, 646 transitions, 12697 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:40:33,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 663 transitions, 14116 flow [2024-06-14 12:40:35,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 663 transitions, 13923 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:35,473 INFO L231 Difference]: Finished difference. Result has 324 places, 647 transitions, 12632 flow [2024-06-14 12:40:35,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12504, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12632, PETRI_PLACES=324, PETRI_TRANSITIONS=647} [2024-06-14 12:40:35,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 12:40:35,473 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 647 transitions, 12632 flow [2024-06-14 12:40:35,473 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 12:40:35,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:35,473 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 12:40:35,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:40:35,474 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 12:40:35,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1462207788, now seen corresponding path program 1 times [2024-06-14 12:40:35,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:35,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407068069] [2024-06-14 12:40:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:35,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:36,080 INFO 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 12:40:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:36,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407068069] [2024-06-14 12:40:36,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407068069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:36,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:36,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313584367] [2024-06-14 12:40:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:36,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:36,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:36,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:36,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:36,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 647 transitions, 12632 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 12:40:36,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:36,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:36,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:38,695 INFO L124 PetriNetUnfolderBase]: 6936/10964 cut-off events. [2024-06-14 12:40:38,695 INFO L125 PetriNetUnfolderBase]: For 424774/424827 co-relation queries the response was YES. [2024-06-14 12:40:38,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83887 conditions, 10964 events. 6936/10964 cut-off events. For 424774/424827 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 73270 event pairs, 1977 based on Foata normal form. 54/11017 useless extension candidates. Maximal degree in co-relation 83739. Up to 9975 conditions per place. [2024-06-14 12:40:38,869 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 149 changer transitions 0/702 dead transitions. [2024-06-14 12:40:38,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 702 transitions, 14722 flow [2024-06-14 12:40:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:40:38,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:40:38,870 INFO L175 Difference]: Start difference. First operand has 324 places, 647 transitions, 12632 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:40:38,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 702 transitions, 14722 flow [2024-06-14 12:40:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 702 transitions, 14582 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:40,915 INFO L231 Difference]: Finished difference. Result has 329 places, 657 transitions, 13003 flow [2024-06-14 12:40:40,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13003, PETRI_PLACES=329, PETRI_TRANSITIONS=657} [2024-06-14 12:40:40,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 12:40:40,916 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 657 transitions, 13003 flow [2024-06-14 12:40:40,917 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 12:40:40,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:40,917 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 12:40:40,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:40:40,917 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 12:40:40,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash -721852438, now seen corresponding path program 2 times [2024-06-14 12:40:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:40,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765372711] [2024-06-14 12:40:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:41,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765372711] [2024-06-14 12:40:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765372711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763772856] [2024-06-14 12:40:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:41,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:41,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 657 transitions, 13003 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 12:40:41,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:41,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:41,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:44,331 INFO L124 PetriNetUnfolderBase]: 7026/11096 cut-off events. [2024-06-14 12:40:44,331 INFO L125 PetriNetUnfolderBase]: For 450767/450820 co-relation queries the response was YES. [2024-06-14 12:40:44,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86619 conditions, 11096 events. 7026/11096 cut-off events. For 450767/450820 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 74738 event pairs, 2351 based on Foata normal form. 54/11149 useless extension candidates. Maximal degree in co-relation 86468. Up to 10244 conditions per place. [2024-06-14 12:40:44,495 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 556 selfloop transitions, 153 changer transitions 0/712 dead transitions. [2024-06-14 12:40:44,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 712 transitions, 15180 flow [2024-06-14 12:40:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:40:44,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-14 12:40:44,497 INFO L175 Difference]: Start difference. First operand has 329 places, 657 transitions, 13003 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:40:44,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 712 transitions, 15180 flow [2024-06-14 12:40:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 712 transitions, 14783 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:46,370 INFO L231 Difference]: Finished difference. Result has 335 places, 670 transitions, 13235 flow [2024-06-14 12:40:46,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12708, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13235, PETRI_PLACES=335, PETRI_TRANSITIONS=670} [2024-06-14 12:40:46,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 12:40:46,371 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 670 transitions, 13235 flow [2024-06-14 12:40:46,371 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 12:40:46,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:46,371 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 12:40:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:40:46,371 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 12:40:46,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -688372438, now seen corresponding path program 3 times [2024-06-14 12:40:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:46,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788246020] [2024-06-14 12:40:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:47,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788246020] [2024-06-14 12:40:47,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788246020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:47,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:47,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579163585] [2024-06-14 12:40:47,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:47,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:47,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:47,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 670 transitions, 13235 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 12:40:47,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:47,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:49,995 INFO L124 PetriNetUnfolderBase]: 7016/11078 cut-off events. [2024-06-14 12:40:49,996 INFO L125 PetriNetUnfolderBase]: For 450118/450179 co-relation queries the response was YES. [2024-06-14 12:40:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86342 conditions, 11078 events. 7016/11078 cut-off events. For 450118/450179 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 74503 event pairs, 2366 based on Foata normal form. 62/11139 useless extension candidates. Maximal degree in co-relation 86188. Up to 10356 conditions per place. [2024-06-14 12:40:50,152 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 145 changer transitions 0/707 dead transitions. [2024-06-14 12:40:50,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 707 transitions, 14992 flow [2024-06-14 12:40:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:40:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:40:50,153 INFO L175 Difference]: Start difference. First operand has 335 places, 670 transitions, 13235 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:40:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 707 transitions, 14992 flow [2024-06-14 12:40:51,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 707 transitions, 14779 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:51,910 INFO L231 Difference]: Finished difference. Result has 339 places, 671 transitions, 13329 flow [2024-06-14 12:40:51,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13022, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13329, PETRI_PLACES=339, PETRI_TRANSITIONS=671} [2024-06-14 12:40:51,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 12:40:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 671 transitions, 13329 flow [2024-06-14 12:40:51,912 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 12:40:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:51,912 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 12:40:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:40:51,912 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 12:40:51,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -689438838, now seen corresponding path program 1 times [2024-06-14 12:40:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758346690] [2024-06-14 12:40:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:52,879 INFO 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 12:40:52,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:52,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758346690] [2024-06-14 12:40:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758346690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:52,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:52,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:52,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820443032] [2024-06-14 12:40:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:52,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:52,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:52,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 671 transitions, 13329 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 12:40:52,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:52,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:52,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:55,717 INFO L124 PetriNetUnfolderBase]: 7092/11184 cut-off events. [2024-06-14 12:40:55,717 INFO L125 PetriNetUnfolderBase]: For 464345/464406 co-relation queries the response was YES. [2024-06-14 12:40:55,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87248 conditions, 11184 events. 7092/11184 cut-off events. For 464345/464406 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 75161 event pairs, 2359 based on Foata normal form. 62/11245 useless extension candidates. Maximal degree in co-relation 87093. Up to 9851 conditions per place. [2024-06-14 12:40:55,893 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 485 selfloop transitions, 241 changer transitions 0/729 dead transitions. [2024-06-14 12:40:55,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 729 transitions, 15547 flow [2024-06-14 12:40:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:40:55,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-14 12:40:55,894 INFO L175 Difference]: Start difference. First operand has 339 places, 671 transitions, 13329 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:40:55,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 729 transitions, 15547 flow [2024-06-14 12:40:58,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 729 transitions, 15278 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:58,340 INFO L231 Difference]: Finished difference. Result has 342 places, 690 transitions, 13871 flow [2024-06-14 12:40:58,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13060, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13871, PETRI_PLACES=342, PETRI_TRANSITIONS=690} [2024-06-14 12:40:58,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-14 12:40:58,340 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 690 transitions, 13871 flow [2024-06-14 12:40:58,340 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 12:40:58,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:58,341 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 12:40:58,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:40:58,341 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 12:40:58,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 796004326, now seen corresponding path program 1 times [2024-06-14 12:40:58,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:58,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270391164] [2024-06-14 12:40:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:58,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:59,001 INFO 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 12:40:59,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:59,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270391164] [2024-06-14 12:40:59,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270391164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:59,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:59,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:59,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688852504] [2024-06-14 12:40:59,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:59,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:59,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:59,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 690 transitions, 13871 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 12:40:59,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:59,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:01,941 INFO L124 PetriNetUnfolderBase]: 7152/11273 cut-off events. [2024-06-14 12:41:01,941 INFO L125 PetriNetUnfolderBase]: For 499880/499934 co-relation queries the response was YES. [2024-06-14 12:41:02,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89442 conditions, 11273 events. 7152/11273 cut-off events. For 499880/499934 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 75862 event pairs, 2455 based on Foata normal form. 64/11336 useless extension candidates. Maximal degree in co-relation 89286. Up to 10599 conditions per place. [2024-06-14 12:41:02,132 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 632 selfloop transitions, 95 changer transitions 0/730 dead transitions. [2024-06-14 12:41:02,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 730 transitions, 15659 flow [2024-06-14 12:41:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:41:02,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:41:02,134 INFO L175 Difference]: Start difference. First operand has 342 places, 690 transitions, 13871 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:41:02,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 730 transitions, 15659 flow [2024-06-14 12:41:04,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 730 transitions, 15492 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:04,409 INFO L231 Difference]: Finished difference. Result has 347 places, 694 transitions, 14001 flow [2024-06-14 12:41:04,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13706, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14001, PETRI_PLACES=347, PETRI_TRANSITIONS=694} [2024-06-14 12:41:04,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 12:41:04,409 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 694 transitions, 14001 flow [2024-06-14 12:41:04,410 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 12:41:04,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:04,410 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 12:41:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:41:04,410 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:04,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 713024242, now seen corresponding path program 2 times [2024-06-14 12:41:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:04,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045312769] [2024-06-14 12:41:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:05,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045312769] [2024-06-14 12:41:05,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045312769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:05,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:05,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934774382] [2024-06-14 12:41:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:05,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:05,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:05,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 694 transitions, 14001 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 12:41:05,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:05,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:05,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:08,116 INFO L124 PetriNetUnfolderBase]: 7404/11623 cut-off events. [2024-06-14 12:41:08,116 INFO L125 PetriNetUnfolderBase]: For 570134/570188 co-relation queries the response was YES. [2024-06-14 12:41:08,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93991 conditions, 11623 events. 7404/11623 cut-off events. For 570134/570188 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 78216 event pairs, 2498 based on Foata normal form. 64/11686 useless extension candidates. Maximal degree in co-relation 93833. Up to 10255 conditions per place. [2024-06-14 12:41:08,314 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 621 selfloop transitions, 136 changer transitions 0/760 dead transitions. [2024-06-14 12:41:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 760 transitions, 16604 flow [2024-06-14 12:41:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:41:08,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-14 12:41:08,316 INFO L175 Difference]: Start difference. First operand has 347 places, 694 transitions, 14001 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:41:08,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 760 transitions, 16604 flow [2024-06-14 12:41:10,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 760 transitions, 16345 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:10,732 INFO L231 Difference]: Finished difference. Result has 353 places, 713 transitions, 14472 flow [2024-06-14 12:41:10,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13742, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14472, PETRI_PLACES=353, PETRI_TRANSITIONS=713} [2024-06-14 12:41:10,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 12:41:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 713 transitions, 14472 flow [2024-06-14 12:41:10,733 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 12:41:10,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:10,733 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 12:41:10,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:41:10,733 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 12:41:10,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 918368294, now seen corresponding path program 3 times [2024-06-14 12:41:10,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:10,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501657213] [2024-06-14 12:41:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:10,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:11,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:11,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501657213] [2024-06-14 12:41:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501657213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:11,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548157149] [2024-06-14 12:41:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:11,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:11,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 713 transitions, 14472 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 12:41:11,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:11,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:14,476 INFO L124 PetriNetUnfolderBase]: 7368/11576 cut-off events. [2024-06-14 12:41:14,476 INFO L125 PetriNetUnfolderBase]: For 566424/566478 co-relation queries the response was YES. [2024-06-14 12:41:14,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94966 conditions, 11576 events. 7368/11576 cut-off events. For 566424/566478 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 77865 event pairs, 2468 based on Foata normal form. 64/11639 useless extension candidates. Maximal degree in co-relation 94804. Up to 10239 conditions per place. [2024-06-14 12:41:14,669 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 602 selfloop transitions, 146 changer transitions 0/751 dead transitions. [2024-06-14 12:41:14,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 751 transitions, 16556 flow [2024-06-14 12:41:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:41:14,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-14 12:41:14,670 INFO L175 Difference]: Start difference. First operand has 353 places, 713 transitions, 14472 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:41:14,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 751 transitions, 16556 flow [2024-06-14 12:41:17,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 751 transitions, 16379 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-06-14 12:41:17,307 INFO L231 Difference]: Finished difference. Result has 360 places, 713 transitions, 14596 flow [2024-06-14 12:41:17,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14295, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14596, PETRI_PLACES=360, PETRI_TRANSITIONS=713} [2024-06-14 12:41:17,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 12:41:17,307 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 713 transitions, 14596 flow [2024-06-14 12:41:17,307 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 12:41:17,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:17,308 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 12:41:17,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:41:17,308 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:17,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1187678168, now seen corresponding path program 4 times [2024-06-14 12:41:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:17,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048563534] [2024-06-14 12:41:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:18,176 INFO 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 12:41:18,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048563534] [2024-06-14 12:41:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048563534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:18,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067843005] [2024-06-14 12:41:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:18,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:18,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 713 transitions, 14596 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 12:41:18,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:18,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:18,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:21,440 INFO L124 PetriNetUnfolderBase]: 7624/11963 cut-off events. [2024-06-14 12:41:21,440 INFO L125 PetriNetUnfolderBase]: For 624351/624383 co-relation queries the response was YES. [2024-06-14 12:41:21,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99501 conditions, 11963 events. 7624/11963 cut-off events. For 624351/624383 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 80741 event pairs, 2647 based on Foata normal form. 36/11998 useless extension candidates. Maximal degree in co-relation 99336. Up to 10899 conditions per place. [2024-06-14 12:41:21,659 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 602 selfloop transitions, 172 changer transitions 0/777 dead transitions. [2024-06-14 12:41:21,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 777 transitions, 16771 flow [2024-06-14 12:41:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:41:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:41:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:41:21,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-14 12:41:21,660 INFO L175 Difference]: Start difference. First operand has 360 places, 713 transitions, 14596 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:41:21,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 777 transitions, 16771 flow [2024-06-14 12:41:24,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 777 transitions, 16485 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:24,892 INFO L231 Difference]: Finished difference. Result has 364 places, 735 transitions, 15014 flow [2024-06-14 12:41:24,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14310, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15014, PETRI_PLACES=364, PETRI_TRANSITIONS=735} [2024-06-14 12:41:24,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 12:41:24,893 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 735 transitions, 15014 flow [2024-06-14 12:41:24,893 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 12:41:24,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:24,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:41:24,893 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 12:41:24,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1261769598, now seen corresponding path program 2 times [2024-06-14 12:41:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011105937] [2024-06-14 12:41:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:25,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:25,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011105937] [2024-06-14 12:41:25,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011105937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:25,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:25,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414920415] [2024-06-14 12:41:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:26,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:26,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 735 transitions, 15014 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 12:41:26,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:26,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:26,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:29,599 INFO L124 PetriNetUnfolderBase]: 7696/12063 cut-off events. [2024-06-14 12:41:29,599 INFO L125 PetriNetUnfolderBase]: For 651306/651338 co-relation queries the response was YES. [2024-06-14 12:41:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101235 conditions, 12063 events. 7696/12063 cut-off events. For 651306/651338 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 81440 event pairs, 2676 based on Foata normal form. 36/12098 useless extension candidates. Maximal degree in co-relation 101068. Up to 11151 conditions per place. [2024-06-14 12:41:29,807 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 594 selfloop transitions, 187 changer transitions 0/784 dead transitions. [2024-06-14 12:41:29,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 784 transitions, 17054 flow [2024-06-14 12:41:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:41:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:41:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-14 12:41:29,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:41:29,808 INFO L175 Difference]: Start difference. First operand has 364 places, 735 transitions, 15014 flow. Second operand 12 states and 213 transitions. [2024-06-14 12:41:29,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 784 transitions, 17054 flow [2024-06-14 12:41:33,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 784 transitions, 16845 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:33,946 INFO L231 Difference]: Finished difference. Result has 371 places, 748 transitions, 15437 flow [2024-06-14 12:41:33,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14805, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15437, PETRI_PLACES=371, PETRI_TRANSITIONS=748} [2024-06-14 12:41:33,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 12:41:33,947 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 748 transitions, 15437 flow [2024-06-14 12:41:33,947 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 12:41:33,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:33,947 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 12:41:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:41:33,947 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:33,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1261769908, now seen corresponding path program 5 times [2024-06-14 12:41:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:33,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357819304] [2024-06-14 12:41:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357819304] [2024-06-14 12:41:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357819304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:35,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625520672] [2024-06-14 12:41:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:35,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:35,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 748 transitions, 15437 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 12:41:35,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:35,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:35,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:39,755 INFO L124 PetriNetUnfolderBase]: 7800/12223 cut-off events. [2024-06-14 12:41:39,755 INFO L125 PetriNetUnfolderBase]: For 724896/724928 co-relation queries the response was YES. [2024-06-14 12:41:39,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103422 conditions, 12223 events. 7800/12223 cut-off events. For 724896/724928 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 82640 event pairs, 2692 based on Foata normal form. 60/12282 useless extension candidates. Maximal degree in co-relation 103252. Up to 11363 conditions per place. [2024-06-14 12:41:39,931 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 629 selfloop transitions, 159 changer transitions 0/791 dead transitions. [2024-06-14 12:41:39,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 791 transitions, 17305 flow [2024-06-14 12:41:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:41:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:41:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 12:41:39,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-14 12:41:39,932 INFO L175 Difference]: Start difference. First operand has 371 places, 748 transitions, 15437 flow. Second operand 11 states and 202 transitions. [2024-06-14 12:41:39,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 791 transitions, 17305 flow [2024-06-14 12:41:43,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 791 transitions, 17040 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:43,727 INFO L231 Difference]: Finished difference. Result has 375 places, 753 transitions, 15620 flow [2024-06-14 12:41:43,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15172, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15620, PETRI_PLACES=375, PETRI_TRANSITIONS=753} [2024-06-14 12:41:43,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-14 12:41:43,727 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 753 transitions, 15620 flow [2024-06-14 12:41:43,727 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 12:41:43,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:43,728 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 12:41:43,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:41:43,728 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:43,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash 913639006, now seen corresponding path program 1 times [2024-06-14 12:41:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:43,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238142977] [2024-06-14 12:41:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:44,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:44,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238142977] [2024-06-14 12:41:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238142977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:44,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349885321] [2024-06-14 12:41:44,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:44,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:44,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:45,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:45,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 753 transitions, 15620 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 12:41:45,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:45,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:45,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:49,047 INFO L124 PetriNetUnfolderBase]: 7813/12236 cut-off events. [2024-06-14 12:41:49,048 INFO L125 PetriNetUnfolderBase]: For 682183/682189 co-relation queries the response was YES. [2024-06-14 12:41:49,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104304 conditions, 12236 events. 7813/12236 cut-off events. For 682183/682189 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 82616 event pairs, 2982 based on Foata normal form. 8/12243 useless extension candidates. Maximal degree in co-relation 104132. Up to 11989 conditions per place. [2024-06-14 12:41:49,226 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 744 selfloop transitions, 38 changer transitions 0/785 dead transitions. [2024-06-14 12:41:49,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 785 transitions, 17408 flow [2024-06-14 12:41:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:41:49,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 12:41:49,227 INFO L175 Difference]: Start difference. First operand has 375 places, 753 transitions, 15620 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:41:49,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 785 transitions, 17408 flow [2024-06-14 12:41:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 785 transitions, 17082 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 12:41:52,890 INFO L231 Difference]: Finished difference. Result has 378 places, 763 transitions, 15571 flow [2024-06-14 12:41:52,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15294, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15571, PETRI_PLACES=378, PETRI_TRANSITIONS=763} [2024-06-14 12:41:52,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 12:41:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 763 transitions, 15571 flow [2024-06-14 12:41:52,891 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 12:41:52,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:52,891 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 12:41:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:41:52,891 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:52,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash -111838390, now seen corresponding path program 3 times [2024-06-14 12:41:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600007278] [2024-06-14 12:41:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:53,971 INFO 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 12:41:53,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:53,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600007278] [2024-06-14 12:41:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600007278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:53,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594008684] [2024-06-14 12:41:53,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:54,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:54,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 763 transitions, 15571 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 12:41:54,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:54,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:54,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:58,370 INFO L124 PetriNetUnfolderBase]: 7821/12253 cut-off events. [2024-06-14 12:41:58,371 INFO L125 PetriNetUnfolderBase]: For 690776/690830 co-relation queries the response was YES. [2024-06-14 12:41:58,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104233 conditions, 12253 events. 7821/12253 cut-off events. For 690776/690830 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 82825 event pairs, 2650 based on Foata normal form. 58/12310 useless extension candidates. Maximal degree in co-relation 104057. Up to 11434 conditions per place. [2024-06-14 12:41:58,556 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 637 selfloop transitions, 154 changer transitions 0/794 dead transitions. [2024-06-14 12:41:58,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 794 transitions, 17361 flow [2024-06-14 12:41:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:41:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:41:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 12:41:58,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:41:58,557 INFO L175 Difference]: Start difference. First operand has 378 places, 763 transitions, 15571 flow. Second operand 11 states and 187 transitions. [2024-06-14 12:41:58,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 794 transitions, 17361 flow [2024-06-14 12:42:02,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 794 transitions, 17230 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:02,152 INFO L231 Difference]: Finished difference. Result has 385 places, 767 transitions, 15853 flow [2024-06-14 12:42:02,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15440, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15853, PETRI_PLACES=385, PETRI_TRANSITIONS=767} [2024-06-14 12:42:02,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 12:42:02,153 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 767 transitions, 15853 flow [2024-06-14 12:42:02,153 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 12:42:02,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:02,153 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 12:42:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:42:02,153 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:02,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash -111838700, now seen corresponding path program 6 times [2024-06-14 12:42:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709678367] [2024-06-14 12:42:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:03,034 INFO 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 12:42:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709678367] [2024-06-14 12:42:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709678367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:03,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:03,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:03,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219401765] [2024-06-14 12:42:03,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:03,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:03,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:03,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:03,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 767 transitions, 15853 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 12:42:03,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:07,065 INFO L124 PetriNetUnfolderBase]: 7755/12158 cut-off events. [2024-06-14 12:42:07,066 INFO L125 PetriNetUnfolderBase]: For 696103/696157 co-relation queries the response was YES. [2024-06-14 12:42:07,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102084 conditions, 12158 events. 7755/12158 cut-off events. For 696103/696157 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 82209 event pairs, 2630 based on Foata normal form. 82/12239 useless extension candidates. Maximal degree in co-relation 101906. Up to 11386 conditions per place. [2024-06-14 12:42:07,251 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 663 selfloop transitions, 131 changer transitions 0/797 dead transitions. [2024-06-14 12:42:07,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 797 transitions, 17621 flow [2024-06-14 12:42:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:42:07,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:42:07,253 INFO L175 Difference]: Start difference. First operand has 385 places, 767 transitions, 15853 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:42:07,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 797 transitions, 17621 flow [2024-06-14 12:42:10,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 797 transitions, 17253 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:10,854 INFO L231 Difference]: Finished difference. Result has 387 places, 768 transitions, 15773 flow [2024-06-14 12:42:10,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15485, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15773, PETRI_PLACES=387, PETRI_TRANSITIONS=768} [2024-06-14 12:42:10,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-14 12:42:10,855 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 768 transitions, 15773 flow [2024-06-14 12:42:10,855 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 12:42:10,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:10,855 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 12:42:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:42:10,855 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:10,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1075015466, now seen corresponding path program 7 times [2024-06-14 12:42:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140097410] [2024-06-14 12:42:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140097410] [2024-06-14 12:42:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140097410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:12,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278906778] [2024-06-14 12:42:12,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:12,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:12,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:12,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 768 transitions, 15773 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 12:42:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:16,285 INFO L124 PetriNetUnfolderBase]: 8543/13337 cut-off events. [2024-06-14 12:42:16,286 INFO L125 PetriNetUnfolderBase]: For 742681/742683 co-relation queries the response was YES. [2024-06-14 12:42:16,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114994 conditions, 13337 events. 8543/13337 cut-off events. For 742681/742683 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 90703 event pairs, 3298 based on Foata normal form. 6/13342 useless extension candidates. Maximal degree in co-relation 114815. Up to 11741 conditions per place. [2024-06-14 12:42:16,498 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 673 selfloop transitions, 261 changer transitions 0/937 dead transitions. [2024-06-14 12:42:16,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 937 transitions, 21217 flow [2024-06-14 12:42:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:42:16,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-14 12:42:16,499 INFO L175 Difference]: Start difference. First operand has 387 places, 768 transitions, 15773 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:42:16,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 937 transitions, 21217 flow [2024-06-14 12:42:21,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 937 transitions, 20811 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:21,538 INFO L231 Difference]: Finished difference. Result has 393 places, 886 transitions, 19328 flow [2024-06-14 12:42:21,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15501, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19328, PETRI_PLACES=393, PETRI_TRANSITIONS=886} [2024-06-14 12:42:21,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 12:42:21,539 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 886 transitions, 19328 flow [2024-06-14 12:42:21,539 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 12:42:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:21,539 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 12:42:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:42:21,539 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 12:42:21,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1193345318, now seen corresponding path program 4 times [2024-06-14 12:42:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:21,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412659792] [2024-06-14 12:42:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:22,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:22,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412659792] [2024-06-14 12:42:22,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412659792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:22,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:22,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:22,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559980468] [2024-06-14 12:42:22,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:22,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:22,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:22,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:22,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 886 transitions, 19328 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 12:42:22,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:22,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:22,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:26,922 INFO L124 PetriNetUnfolderBase]: 8663/13509 cut-off events. [2024-06-14 12:42:26,923 INFO L125 PetriNetUnfolderBase]: For 825426/825468 co-relation queries the response was YES. [2024-06-14 12:42:27,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119099 conditions, 13509 events. 8663/13509 cut-off events. For 825426/825468 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 92117 event pairs, 2631 based on Foata normal form. 64/13572 useless extension candidates. Maximal degree in co-relation 118915. Up to 12561 conditions per place. [2024-06-14 12:42:27,187 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 772 selfloop transitions, 151 changer transitions 0/926 dead transitions. [2024-06-14 12:42:27,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 926 transitions, 21627 flow [2024-06-14 12:42:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:42:27,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:42:27,188 INFO L175 Difference]: Start difference. First operand has 393 places, 886 transitions, 19328 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:42:27,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 926 transitions, 21627 flow