./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:32:52,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:32:52,615 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:32:52,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:32:52,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:32:52,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:32:52,649 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:32:52,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:32:52,650 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:32:52,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:32:52,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:32:52,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:32:52,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:32:52,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:32:52,657 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:32:52,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:32:52,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:32:52,658 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:32:52,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:32:52,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:32:52,658 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:32:52,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:32:52,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:32:52,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:32:52,659 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:32:52,659 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:32:52,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:32:52,660 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:32:52,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:32:52,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:32:52,661 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:32:52,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:32:52,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:32:52,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:32:52,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:32:52,662 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:32:52,662 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:32:52,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:32:52,663 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:32:52,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:32:52,663 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:32:52,663 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:32:52,664 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:32:52,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:32:52,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:32:52,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:32:52,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:32:52,873 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:32:52,874 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:32:52,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 15:32:53,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:32:53,040 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:32:53,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:32:53,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:32:54,121 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:32:54,122 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:32:54,142 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57fd534f4/a0780a87a9994f63a0fae8936f40035d/FLAGefff98881 [2024-06-04 15:32:54,152 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57fd534f4/a0780a87a9994f63a0fae8936f40035d [2024-06-04 15:32:54,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:32:54,153 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:32:54,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:32:54,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:32:54,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:32:54,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:32:53" (1/2) ... [2024-06-04 15:32:54,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6a4f3c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:32:54, skipping insertion in model container [2024-06-04 15:32:54,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:32:53" (1/2) ... [2024-06-04 15:32:54,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e2d2c02 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:32:54, skipping insertion in model container [2024-06-04 15:32:54,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:32:54" (2/2) ... [2024-06-04 15:32:54,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6a4f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54, skipping insertion in model container [2024-06-04 15:32:54,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:32:54" (2/2) ... [2024-06-04 15:32:54,163 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:32:54,254 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:32:54,255 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-04 15:32:54,255 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-04 15:32:54,256 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-04 15:32:54,256 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:32:54,256 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-04 15:32:54,304 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:32:54,629 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:32:54,640 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:32:54,743 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:32:54,772 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:32:54,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54 WrapperNode [2024-06-04 15:32:54,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:32:54,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:32:54,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:32:54,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:32:54,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,846 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-04 15:32:54,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:32:54,847 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:32:54,847 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:32:54,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:32:54,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,886 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]. [2024-06-04 15:32:54,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:32:54,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:32:54,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:32:54,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:32:54,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (1/1) ... [2024-06-04 15:32:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:32:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:32:54,944 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) [2024-06-04 15:32:54,960 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 [2024-06-04 15:32:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:32:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:32:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:32:54,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:32:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:32:54,972 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:32:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:32:54,972 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:32:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:32:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:32:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:32:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:32:54,974 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:32:55,069 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:32:55,071 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:32:55,409 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:32:55,409 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:32:55,589 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:32:55,590 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:32:55,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:32:55 BoogieIcfgContainer [2024-06-04 15:32:55,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:32:55,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:32:55,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:32:55,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:32:55,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:32:53" (1/4) ... [2024-06-04 15:32:55,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee2a085 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:32:55, skipping insertion in model container [2024-06-04 15:32:55,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:32:54" (2/4) ... [2024-06-04 15:32:55,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee2a085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:32:55, skipping insertion in model container [2024-06-04 15:32:55,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:32:54" (3/4) ... [2024-06-04 15:32:55,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee2a085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:32:55, skipping insertion in model container [2024-06-04 15:32:55,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:32:55" (4/4) ... [2024-06-04 15:32:55,598 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:32:55,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:32:55,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:32:55,610 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:32:55,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:32:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:32:55,704 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 15:32:55,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:32:55,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:32:55,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:32:55,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 15:32:55,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:32:55,725 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;@2ba1c54a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:32:55,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:32:55,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:32:55,730 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:32:55,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:32:55,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:32:55,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:32:55,731 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)] === [2024-06-04 15:32:55,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:32:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash 768558868, now seen corresponding path program 1 times [2024-06-04 15:32:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:32:55,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511099391] [2024-06-04 15:32:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:32:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:32:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:32:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:32:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:32:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511099391] [2024-06-04 15:32:56,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511099391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:32:56,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:32:56,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:32:56,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888598949] [2024-06-04 15:32:56,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:32:56,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:32:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:32:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:32:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:32:56,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:32:56,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:56,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:32:56,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:32:56,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:32:57,390 INFO L124 PetriNetUnfolderBase]: 1650/2466 cut-off events. [2024-06-04 15:32:57,390 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 15:32:57,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5020 conditions, 2466 events. 1650/2466 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11597 event pairs, 881 based on Foata normal form. 4/2429 useless extension candidates. Maximal degree in co-relation 5005. Up to 2444 conditions per place. [2024-06-04 15:32:57,402 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 15:32:57,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 189 flow [2024-06-04 15:32:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:32:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:32:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-04 15:32:57,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 15:32:57,412 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-04 15:32:57,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 189 flow [2024-06-04 15:32:57,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:32:57,415 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 15:32:57,417 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} [2024-06-04 15:32:57,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 15:32:57,419 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 15:32:57,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:57,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:32:57,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:32:57,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:32:57,420 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)] === [2024-06-04 15:32:57,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:32:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash -149255181, now seen corresponding path program 1 times [2024-06-04 15:32:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:32:57,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227417256] [2024-06-04 15:32:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:32:57,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:32:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:32:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:32:58,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:32:58,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227417256] [2024-06-04 15:32:58,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227417256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:32:58,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:32:58,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:32:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238843792] [2024-06-04 15:32:58,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:32:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:32:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:32:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:32:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:32:58,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:32:58,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:58,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:32:58,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:32:58,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:32:58,483 INFO L124 PetriNetUnfolderBase]: 1659/2478 cut-off events. [2024-06-04 15:32:58,484 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-06-04 15:32:58,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5690 conditions, 2478 events. 1659/2478 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11335 event pairs, 955 based on Foata normal form. 6/2483 useless extension candidates. Maximal degree in co-relation 5675. Up to 2441 conditions per place. [2024-06-04 15:32:58,495 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-04 15:32:58,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 274 flow [2024-06-04 15:32:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:32:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:32:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-04 15:32:58,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 15:32:58,497 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 87 transitions. [2024-06-04 15:32:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 274 flow [2024-06-04 15:32:58,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:32:58,499 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 156 flow [2024-06-04 15:32:58,499 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-04 15:32:58,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 15:32:58,500 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 156 flow [2024-06-04 15:32:58,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:58,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:32:58,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:32:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:32:58,501 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)] === [2024-06-04 15:32:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:32:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash -331941767, now seen corresponding path program 1 times [2024-06-04 15:32:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:32:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60808614] [2024-06-04 15:32:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:32:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:32:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:32:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:32:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:32:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60808614] [2024-06-04 15:32:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60808614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:32:59,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:32:59,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:32:59,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493505686] [2024-06-04 15:32:59,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:32:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:32:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:32:59,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:32:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:32:59,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:32:59,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:59,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:32:59,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:32:59,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:32:59,721 INFO L124 PetriNetUnfolderBase]: 1751/2608 cut-off events. [2024-06-04 15:32:59,722 INFO L125 PetriNetUnfolderBase]: For 1276/1276 co-relation queries the response was YES. [2024-06-04 15:32:59,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6762 conditions, 2608 events. 1751/2608 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12092 event pairs, 770 based on Foata normal form. 11/2618 useless extension candidates. Maximal degree in co-relation 6744. Up to 2426 conditions per place. [2024-06-04 15:32:59,734 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-04 15:32:59,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 83 transitions, 450 flow [2024-06-04 15:32:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:32:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:32:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 15:32:59,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 15:32:59,739 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 156 flow. Second operand 5 states and 116 transitions. [2024-06-04 15:32:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 83 transitions, 450 flow [2024-06-04 15:32:59,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 440 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 15:32:59,743 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 259 flow [2024-06-04 15:32:59,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-04 15:32:59,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-04 15:32:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 259 flow [2024-06-04 15:32:59,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:32:59,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:32:59,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:32:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:32:59,745 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)] === [2024-06-04 15:32:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:32:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1700258606, now seen corresponding path program 1 times [2024-06-04 15:32:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:32:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273250235] [2024-06-04 15:32:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:32:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:32:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:00,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:00,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273250235] [2024-06-04 15:33:00,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273250235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:33:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399277655] [2024-06-04 15:33:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:00,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:33:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:33:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:33:00,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:33:00,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:00,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:00,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:33:00,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:01,316 INFO L124 PetriNetUnfolderBase]: 1795/2671 cut-off events. [2024-06-04 15:33:01,317 INFO L125 PetriNetUnfolderBase]: For 3250/3252 co-relation queries the response was YES. [2024-06-04 15:33:01,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8253 conditions, 2671 events. 1795/2671 cut-off events. For 3250/3252 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12344 event pairs, 628 based on Foata normal form. 13/2683 useless extension candidates. Maximal degree in co-relation 8231. Up to 2437 conditions per place. [2024-06-04 15:33:01,329 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 72 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-04 15:33:01,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 97 transitions, 603 flow [2024-06-04 15:33:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 15:33:01,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 15:33:01,332 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 259 flow. Second operand 6 states and 138 transitions. [2024-06-04 15:33:01,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 97 transitions, 603 flow [2024-06-04 15:33:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 97 transitions, 595 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 15:33:01,339 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 350 flow [2024-06-04 15:33:01,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-04 15:33:01,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 15:33:01,341 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 350 flow [2024-06-04 15:33:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:01,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:01,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:01,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:33:01,341 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)] === [2024-06-04 15:33:01,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1168407624, now seen corresponding path program 1 times [2024-06-04 15:33:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891957689] [2024-06-04 15:33:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:02,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891957689] [2024-06-04 15:33:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891957689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:02,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:02,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903235474] [2024-06-04 15:33:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:02,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:33:02,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:02,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:02,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:33:02,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:03,309 INFO L124 PetriNetUnfolderBase]: 1930/2884 cut-off events. [2024-06-04 15:33:03,309 INFO L125 PetriNetUnfolderBase]: For 5527/5529 co-relation queries the response was YES. [2024-06-04 15:33:03,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 2884 events. 1930/2884 cut-off events. For 5527/5529 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13676 event pairs, 484 based on Foata normal form. 40/2923 useless extension candidates. Maximal degree in co-relation 10119. Up to 2460 conditions per place. [2024-06-04 15:33:03,326 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 81 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-04 15:33:03,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 110 transitions, 758 flow [2024-06-04 15:33:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 15:33:03,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 15:33:03,328 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 350 flow. Second operand 7 states and 159 transitions. [2024-06-04 15:33:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 110 transitions, 758 flow [2024-06-04 15:33:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 703 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:03,335 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 384 flow [2024-06-04 15:33:03,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-04 15:33:03,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 15:33:03,337 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 384 flow [2024-06-04 15:33:03,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:03,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:03,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:03,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:33:03,342 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)] === [2024-06-04 15:33:03,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2123205461, now seen corresponding path program 1 times [2024-06-04 15:33:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:03,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774306054] [2024-06-04 15:33:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:03,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774306054] [2024-06-04 15:33:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774306054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:03,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:33:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654655442] [2024-06-04 15:33:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:03,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:33:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:33:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:33:03,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:03,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:03,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:03,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:04,416 INFO L124 PetriNetUnfolderBase]: 1916/2864 cut-off events. [2024-06-04 15:33:04,416 INFO L125 PetriNetUnfolderBase]: For 7093/7093 co-relation queries the response was YES. [2024-06-04 15:33:04,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10875 conditions, 2864 events. 1916/2864 cut-off events. For 7093/7093 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13337 event pairs, 761 based on Foata normal form. 5/2868 useless extension candidates. Maximal degree in co-relation 10849. Up to 2818 conditions per place. [2024-06-04 15:33:04,438 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-04 15:33:04,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 604 flow [2024-06-04 15:33:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:33:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:33:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-04 15:33:04,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-04 15:33:04,439 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 384 flow. Second operand 5 states and 88 transitions. [2024-06-04 15:33:04,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 604 flow [2024-06-04 15:33:04,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 553 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:04,444 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 398 flow [2024-06-04 15:33:04,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-04 15:33:04,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 15:33:04,447 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 398 flow [2024-06-04 15:33:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:04,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:04,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:04,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:33:04,447 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)] === [2024-06-04 15:33:04,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1395089477, now seen corresponding path program 1 times [2024-06-04 15:33:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214622234] [2024-06-04 15:33:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:04,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:05,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:05,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214622234] [2024-06-04 15:33:05,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214622234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:05,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:05,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:05,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134727254] [2024-06-04 15:33:05,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:05,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:05,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:05,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:05,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:05,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:05,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:05,601 INFO L124 PetriNetUnfolderBase]: 1906/2850 cut-off events. [2024-06-04 15:33:05,601 INFO L125 PetriNetUnfolderBase]: For 8262/8262 co-relation queries the response was YES. [2024-06-04 15:33:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 2850 events. 1906/2850 cut-off events. For 8262/8262 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13314 event pairs, 738 based on Foata normal form. 4/2853 useless extension candidates. Maximal degree in co-relation 11030. Up to 2810 conditions per place. [2024-06-04 15:33:05,615 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-04 15:33:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 618 flow [2024-06-04 15:33:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 15:33:05,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-04 15:33:05,618 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 398 flow. Second operand 6 states and 97 transitions. [2024-06-04 15:33:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 618 flow [2024-06-04 15:33:05,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 593 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:05,623 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 429 flow [2024-06-04 15:33:05,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-04 15:33:05,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 15:33:05,624 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 429 flow [2024-06-04 15:33:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:05,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:33:05,625 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)] === [2024-06-04 15:33:05,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash -497761048, now seen corresponding path program 1 times [2024-06-04 15:33:05,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:05,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562598528] [2024-06-04 15:33:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562598528] [2024-06-04 15:33:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562598528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:06,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637615549] [2024-06-04 15:33:06,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:06,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:06,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:06,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:06,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:06,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:06,812 INFO L124 PetriNetUnfolderBase]: 1918/2869 cut-off events. [2024-06-04 15:33:06,812 INFO L125 PetriNetUnfolderBase]: For 10142/10146 co-relation queries the response was YES. [2024-06-04 15:33:06,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11652 conditions, 2869 events. 1918/2869 cut-off events. For 10142/10146 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13439 event pairs, 628 based on Foata normal form. 14/2882 useless extension candidates. Maximal degree in co-relation 11623. Up to 2675 conditions per place. [2024-06-04 15:33:06,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-04 15:33:06,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 755 flow [2024-06-04 15:33:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-04 15:33:06,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:33:06,834 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 429 flow. Second operand 6 states and 111 transitions. [2024-06-04 15:33:06,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 755 flow [2024-06-04 15:33:06,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 719 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:06,841 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 465 flow [2024-06-04 15:33:06,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-04 15:33:06,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-04 15:33:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 465 flow [2024-06-04 15:33:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:06,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:33:06,842 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)] === [2024-06-04 15:33:06,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -290957878, now seen corresponding path program 2 times [2024-06-04 15:33:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914384154] [2024-06-04 15:33:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914384154] [2024-06-04 15:33:07,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914384154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:07,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:07,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291601539] [2024-06-04 15:33:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:07,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:07,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:07,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:07,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:07,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:07,936 INFO L124 PetriNetUnfolderBase]: 1863/2780 cut-off events. [2024-06-04 15:33:07,936 INFO L125 PetriNetUnfolderBase]: For 11331/11331 co-relation queries the response was YES. [2024-06-04 15:33:07,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11620 conditions, 2780 events. 1863/2780 cut-off events. For 11331/11331 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12883 event pairs, 727 based on Foata normal form. 5/2784 useless extension candidates. Maximal degree in co-relation 11591. Up to 2740 conditions per place. [2024-06-04 15:33:07,951 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 74 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-04 15:33:07,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 693 flow [2024-06-04 15:33:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 15:33:07,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:33:07,953 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 465 flow. Second operand 6 states and 99 transitions. [2024-06-04 15:33:07,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 693 flow [2024-06-04 15:33:07,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 664 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:07,963 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 466 flow [2024-06-04 15:33:07,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-04 15:33:07,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 15:33:07,964 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 466 flow [2024-06-04 15:33:07,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:07,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:07,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:07,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:33:07,964 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)] === [2024-06-04 15:33:07,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash -657832742, now seen corresponding path program 1 times [2024-06-04 15:33:07,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478118088] [2024-06-04 15:33:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:08,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478118088] [2024-06-04 15:33:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478118088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:08,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485993909] [2024-06-04 15:33:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:08,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:08,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:08,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:08,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:08,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:08,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:09,308 INFO L124 PetriNetUnfolderBase]: 1967/2934 cut-off events. [2024-06-04 15:33:09,308 INFO L125 PetriNetUnfolderBase]: For 13905/13905 co-relation queries the response was YES. [2024-06-04 15:33:09,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 2934 events. 1967/2934 cut-off events. For 13905/13905 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13636 event pairs, 545 based on Foata normal form. 12/2944 useless extension candidates. Maximal degree in co-relation 12308. Up to 2574 conditions per place. [2024-06-04 15:33:09,324 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 96 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-04 15:33:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 1045 flow [2024-06-04 15:33:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:33:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-04 15:33:09,326 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 466 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:33:09,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 1045 flow [2024-06-04 15:33:09,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 979 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:09,335 INFO L231 Difference]: Finished difference. Result has 71 places, 88 transitions, 649 flow [2024-06-04 15:33:09,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=71, PETRI_TRANSITIONS=88} [2024-06-04 15:33:09,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-04 15:33:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 88 transitions, 649 flow [2024-06-04 15:33:09,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:09,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:09,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:09,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:33:09,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:09,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1091122998, now seen corresponding path program 2 times [2024-06-04 15:33:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380561899] [2024-06-04 15:33:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:09,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380561899] [2024-06-04 15:33:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380561899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:09,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043023560] [2024-06-04 15:33:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:09,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:09,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 88 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:09,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:09,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:09,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:10,468 INFO L124 PetriNetUnfolderBase]: 1989/2964 cut-off events. [2024-06-04 15:33:10,468 INFO L125 PetriNetUnfolderBase]: For 16920/16920 co-relation queries the response was YES. [2024-06-04 15:33:10,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13725 conditions, 2964 events. 1989/2964 cut-off events. For 16920/16920 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13797 event pairs, 600 based on Foata normal form. 4/2967 useless extension candidates. Maximal degree in co-relation 13692. Up to 2906 conditions per place. [2024-06-04 15:33:10,486 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-06-04 15:33:10,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 114 transitions, 966 flow [2024-06-04 15:33:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:33:10,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:33:10,488 INFO L175 Difference]: Start difference. First operand has 71 places, 88 transitions, 649 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:33:10,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 114 transitions, 966 flow [2024-06-04 15:33:10,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 922 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:10,503 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 704 flow [2024-06-04 15:33:10,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=704, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-06-04 15:33:10,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-04 15:33:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 704 flow [2024-06-04 15:33:10,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:10,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:10,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:33:10,505 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)] === [2024-06-04 15:33:10,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:10,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1926409230, now seen corresponding path program 3 times [2024-06-04 15:33:10,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:10,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350710617] [2024-06-04 15:33:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:11,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350710617] [2024-06-04 15:33:11,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350710617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:11,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:11,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788572856] [2024-06-04 15:33:11,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:11,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:11,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:11,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:11,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 704 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:11,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:11,688 INFO L124 PetriNetUnfolderBase]: 1995/2973 cut-off events. [2024-06-04 15:33:11,688 INFO L125 PetriNetUnfolderBase]: For 19177/19177 co-relation queries the response was YES. [2024-06-04 15:33:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14193 conditions, 2973 events. 1995/2973 cut-off events. For 19177/19177 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13799 event pairs, 598 based on Foata normal form. 4/2976 useless extension candidates. Maximal degree in co-relation 14157. Up to 2877 conditions per place. [2024-06-04 15:33:11,703 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-06-04 15:33:11,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1129 flow [2024-06-04 15:33:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:33:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:33:11,705 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 704 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:33:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1129 flow [2024-06-04 15:33:11,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1097 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:11,719 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 824 flow [2024-06-04 15:33:11,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-04 15:33:11,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-04 15:33:11,720 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 824 flow [2024-06-04 15:33:11,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:11,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:11,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:11,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:33:11,721 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)] === [2024-06-04 15:33:11,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -651157574, now seen corresponding path program 1 times [2024-06-04 15:33:11,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:11,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325066304] [2024-06-04 15:33:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:11,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:12,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:12,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325066304] [2024-06-04 15:33:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325066304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:12,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:12,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:12,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733504366] [2024-06-04 15:33:12,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:12,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:12,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:12,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:12,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:12,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:12,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:33:12,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:12,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:12,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:13,312 INFO L124 PetriNetUnfolderBase]: 1987/2961 cut-off events. [2024-06-04 15:33:13,312 INFO L125 PetriNetUnfolderBase]: For 21677/21677 co-relation queries the response was YES. [2024-06-04 15:33:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14547 conditions, 2961 events. 1987/2961 cut-off events. For 21677/21677 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13746 event pairs, 579 based on Foata normal form. 4/2964 useless extension candidates. Maximal degree in co-relation 14509. Up to 2903 conditions per place. [2024-06-04 15:33:13,324 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-04 15:33:13,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1140 flow [2024-06-04 15:33:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 15:33:13,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-04 15:33:13,326 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 824 flow. Second operand 7 states and 111 transitions. [2024-06-04 15:33:13,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1140 flow [2024-06-04 15:33:13,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1106 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:13,344 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 855 flow [2024-06-04 15:33:13,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-04 15:33:13,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-04 15:33:13,345 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 855 flow [2024-06-04 15:33:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:33:13,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:13,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:13,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:33:13,346 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)] === [2024-06-04 15:33:13,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1610780025, now seen corresponding path program 1 times [2024-06-04 15:33:13,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736794754] [2024-06-04 15:33:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:14,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736794754] [2024-06-04 15:33:14,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736794754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:14,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:14,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560054568] [2024-06-04 15:33:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:14,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:14,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:14,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:14,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:14,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:14,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:14,727 INFO L124 PetriNetUnfolderBase]: 1991/2966 cut-off events. [2024-06-04 15:33:14,727 INFO L125 PetriNetUnfolderBase]: For 24483/24487 co-relation queries the response was YES. [2024-06-04 15:33:14,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14892 conditions, 2966 events. 1991/2966 cut-off events. For 24483/24487 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13747 event pairs, 585 based on Foata normal form. 9/2974 useless extension candidates. Maximal degree in co-relation 14852. Up to 2711 conditions per place. [2024-06-04 15:33:14,742 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 106 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2024-06-04 15:33:14,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1335 flow [2024-06-04 15:33:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:33:14,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-04 15:33:14,744 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 855 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:33:14,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1335 flow [2024-06-04 15:33:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 148 transitions, 1288 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:14,765 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 966 flow [2024-06-04 15:33:14,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=966, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2024-06-04 15:33:14,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 15:33:14,766 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 966 flow [2024-06-04 15:33:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:14,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:14,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:33:14,766 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)] === [2024-06-04 15:33:14,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1547965536, now seen corresponding path program 1 times [2024-06-04 15:33:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449293971] [2024-06-04 15:33:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:15,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:15,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449293971] [2024-06-04 15:33:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449293971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:15,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700405246] [2024-06-04 15:33:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:15,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:15,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 966 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:15,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:15,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:16,044 INFO L124 PetriNetUnfolderBase]: 2077/3091 cut-off events. [2024-06-04 15:33:16,044 INFO L125 PetriNetUnfolderBase]: For 28818/28820 co-relation queries the response was YES. [2024-06-04 15:33:16,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16404 conditions, 3091 events. 2077/3091 cut-off events. For 28818/28820 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14412 event pairs, 547 based on Foata normal form. 4/3094 useless extension candidates. Maximal degree in co-relation 16363. Up to 2636 conditions per place. [2024-06-04 15:33:16,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 104 selfloop transitions, 45 changer transitions 0/152 dead transitions. [2024-06-04 15:33:16,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 152 transitions, 1567 flow [2024-06-04 15:33:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:33:16,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:33:16,062 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 966 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:33:16,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 152 transitions, 1567 flow [2024-06-04 15:33:16,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 152 transitions, 1452 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:16,086 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1088 flow [2024-06-04 15:33:16,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1088, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-04 15:33:16,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-04 15:33:16,087 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1088 flow [2024-06-04 15:33:16,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:16,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:16,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:16,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:33:16,088 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)] === [2024-06-04 15:33:16,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1547971116, now seen corresponding path program 2 times [2024-06-04 15:33:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831079936] [2024-06-04 15:33:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831079936] [2024-06-04 15:33:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831079936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:16,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:16,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:16,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036238615] [2024-06-04 15:33:16,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:16,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:16,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:16,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:16,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:16,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:17,324 INFO L124 PetriNetUnfolderBase]: 2057/3063 cut-off events. [2024-06-04 15:33:17,324 INFO L125 PetriNetUnfolderBase]: For 32490/32492 co-relation queries the response was YES. [2024-06-04 15:33:17,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 3063 events. 2057/3063 cut-off events. For 32490/32492 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14257 event pairs, 548 based on Foata normal form. 8/3070 useless extension candidates. Maximal degree in co-relation 16926. Up to 2624 conditions per place. [2024-06-04 15:33:17,341 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 48 changer transitions 0/156 dead transitions. [2024-06-04 15:33:17,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1648 flow [2024-06-04 15:33:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:33:17,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-04 15:33:17,344 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1088 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:33:17,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1648 flow [2024-06-04 15:33:17,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1569 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:17,378 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1170 flow [2024-06-04 15:33:17,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1170, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-04 15:33:17,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-04 15:33:17,379 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1170 flow [2024-06-04 15:33:17,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:17,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:17,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:33:17,380 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)] === [2024-06-04 15:33:17,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash -429995479, now seen corresponding path program 1 times [2024-06-04 15:33:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:17,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058495391] [2024-06-04 15:33:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:18,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:18,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058495391] [2024-06-04 15:33:18,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058495391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:18,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:18,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560414280] [2024-06-04 15:33:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:18,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:18,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1170 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:33:18,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:18,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:18,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:18,851 INFO L124 PetriNetUnfolderBase]: 2052/3054 cut-off events. [2024-06-04 15:33:18,852 INFO L125 PetriNetUnfolderBase]: For 34971/34971 co-relation queries the response was YES. [2024-06-04 15:33:18,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17286 conditions, 3054 events. 2052/3054 cut-off events. For 34971/34971 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14135 event pairs, 589 based on Foata normal form. 2/3055 useless extension candidates. Maximal degree in co-relation 17240. Up to 2987 conditions per place. [2024-06-04 15:33:18,866 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 120 selfloop transitions, 19 changer transitions 0/142 dead transitions. [2024-06-04 15:33:18,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1521 flow [2024-06-04 15:33:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:33:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:33:18,868 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1170 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:33:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1521 flow [2024-06-04 15:33:18,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1432 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:18,903 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1154 flow [2024-06-04 15:33:18,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1154, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-04 15:33:18,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-04 15:33:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1154 flow [2024-06-04 15:33:18,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:33:18,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:18,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:33:18,904 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)] === [2024-06-04 15:33:18,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash 313281218, now seen corresponding path program 3 times [2024-06-04 15:33:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223585030] [2024-06-04 15:33:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:19,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:19,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223585030] [2024-06-04 15:33:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223585030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:19,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:19,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33398566] [2024-06-04 15:33:19,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:19,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:19,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1154 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:19,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:19,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:19,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:20,105 INFO L124 PetriNetUnfolderBase]: 2058/3065 cut-off events. [2024-06-04 15:33:20,105 INFO L125 PetriNetUnfolderBase]: For 38254/38258 co-relation queries the response was YES. [2024-06-04 15:33:20,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3065 events. 2058/3065 cut-off events. For 38254/38258 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14256 event pairs, 597 based on Foata normal form. 8/3072 useless extension candidates. Maximal degree in co-relation 17268. Up to 2982 conditions per place. [2024-06-04 15:33:20,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2024-06-04 15:33:20,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-04 15:33:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:33:20,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:33:20,125 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1154 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:33:20,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-04 15:33:20,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1502 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:20,157 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 1212 flow [2024-06-04 15:33:20,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1212, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2024-06-04 15:33:20,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 15:33:20,158 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 1212 flow [2024-06-04 15:33:20,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-04 15:33:20,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:20,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:20,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:33:20,158 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)] === [2024-06-04 15:33:20,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash -860616385, now seen corresponding path program 1 times [2024-06-04 15:33:20,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:20,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211051155] [2024-06-04 15:33:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:21,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:21,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211051155] [2024-06-04 15:33:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211051155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:21,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116374413] [2024-06-04 15:33:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:21,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:21,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:21,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 1212 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:21,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:21,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:21,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:21,780 INFO L124 PetriNetUnfolderBase]: 2186/3273 cut-off events. [2024-06-04 15:33:21,780 INFO L125 PetriNetUnfolderBase]: For 46443/46445 co-relation queries the response was YES. [2024-06-04 15:33:21,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18891 conditions, 3273 events. 2186/3273 cut-off events. For 46443/46445 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15569 event pairs, 435 based on Foata normal form. 4/3276 useless extension candidates. Maximal degree in co-relation 18843. Up to 2583 conditions per place. [2024-06-04 15:33:21,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 125 selfloop transitions, 56 changer transitions 0/184 dead transitions. [2024-06-04 15:33:21,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 184 transitions, 2094 flow [2024-06-04 15:33:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:33:21,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-04 15:33:21,799 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 1212 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:33:21,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 184 transitions, 2094 flow [2024-06-04 15:33:21,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 184 transitions, 2040 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:21,839 INFO L231 Difference]: Finished difference. Result has 107 places, 141 transitions, 1526 flow [2024-06-04 15:33:21,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1526, PETRI_PLACES=107, PETRI_TRANSITIONS=141} [2024-06-04 15:33:21,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 15:33:21,840 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 141 transitions, 1526 flow [2024-06-04 15:33:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:21,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:21,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:33:21,841 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)] === [2024-06-04 15:33:21,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash -860555935, now seen corresponding path program 2 times [2024-06-04 15:33:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:21,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381545777] [2024-06-04 15:33:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:22,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381545777] [2024-06-04 15:33:22,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381545777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:22,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:22,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137997449] [2024-06-04 15:33:22,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:22,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:22,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 141 transitions, 1526 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:22,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:22,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:22,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:23,473 INFO L124 PetriNetUnfolderBase]: 2214/3316 cut-off events. [2024-06-04 15:33:23,473 INFO L125 PetriNetUnfolderBase]: For 53700/53702 co-relation queries the response was YES. [2024-06-04 15:33:23,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20214 conditions, 3316 events. 2214/3316 cut-off events. For 53700/53702 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15880 event pairs, 551 based on Foata normal form. 4/3319 useless extension candidates. Maximal degree in co-relation 20163. Up to 2892 conditions per place. [2024-06-04 15:33:23,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2024-06-04 15:33:23,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2204 flow [2024-06-04 15:33:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:33:23,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:33:23,496 INFO L175 Difference]: Start difference. First operand has 107 places, 141 transitions, 1526 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:33:23,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2204 flow [2024-06-04 15:33:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 182 transitions, 2148 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:23,557 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1667 flow [2024-06-04 15:33:23,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1667, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-04 15:33:23,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 15:33:23,558 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1667 flow [2024-06-04 15:33:23,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:23,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:23,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:33:23,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:23,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1608228951, now seen corresponding path program 1 times [2024-06-04 15:33:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031129776] [2024-06-04 15:33:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031129776] [2024-06-04 15:33:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031129776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71066204] [2024-06-04 15:33:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:24,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:24,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:24,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1667 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:24,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:24,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:24,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:25,110 INFO L124 PetriNetUnfolderBase]: 2204/3302 cut-off events. [2024-06-04 15:33:25,111 INFO L125 PetriNetUnfolderBase]: For 57681/57683 co-relation queries the response was YES. [2024-06-04 15:33:25,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20426 conditions, 3302 events. 2204/3302 cut-off events. For 57681/57683 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15797 event pairs, 553 based on Foata normal form. 4/3305 useless extension candidates. Maximal degree in co-relation 20373. Up to 3000 conditions per place. [2024-06-04 15:33:25,130 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 45 changer transitions 0/177 dead transitions. [2024-06-04 15:33:25,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 2177 flow [2024-06-04 15:33:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:33:25,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:33:25,132 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1667 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:33:25,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 2177 flow [2024-06-04 15:33:25,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 2032 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:25,199 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1620 flow [2024-06-04 15:33:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-04 15:33:25,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-04 15:33:25,200 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1620 flow [2024-06-04 15:33:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:25,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:25,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:25,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:33:25,201 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)] === [2024-06-04 15:33:25,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1608224177, now seen corresponding path program 3 times [2024-06-04 15:33:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881808530] [2024-06-04 15:33:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881808530] [2024-06-04 15:33:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881808530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:26,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839209382] [2024-06-04 15:33:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:26,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:26,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:26,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:26,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:26,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:27,049 INFO L124 PetriNetUnfolderBase]: 2388/3574 cut-off events. [2024-06-04 15:33:27,050 INFO L125 PetriNetUnfolderBase]: For 68984/68988 co-relation queries the response was YES. [2024-06-04 15:33:27,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22135 conditions, 3574 events. 2388/3574 cut-off events. For 68984/68988 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17294 event pairs, 592 based on Foata normal form. 33/3606 useless extension candidates. Maximal degree in co-relation 22081. Up to 3108 conditions per place. [2024-06-04 15:33:27,072 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 156 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-04 15:33:27,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 212 transitions, 2518 flow [2024-06-04 15:33:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:33:27,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-04 15:33:27,074 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1620 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:33:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 212 transitions, 2518 flow [2024-06-04 15:33:27,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 212 transitions, 2400 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:27,160 INFO L231 Difference]: Finished difference. Result has 123 places, 171 transitions, 2002 flow [2024-06-04 15:33:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2002, PETRI_PLACES=123, PETRI_TRANSITIONS=171} [2024-06-04 15:33:27,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 15:33:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 171 transitions, 2002 flow [2024-06-04 15:33:27,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:33:27,161 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)] === [2024-06-04 15:33:27,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1735169193, now seen corresponding path program 2 times [2024-06-04 15:33:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:27,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133722685] [2024-06-04 15:33:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:27,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133722685] [2024-06-04 15:33:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133722685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098239470] [2024-06-04 15:33:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:28,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 171 transitions, 2002 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:28,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:28,869 INFO L124 PetriNetUnfolderBase]: 2410/3607 cut-off events. [2024-06-04 15:33:28,870 INFO L125 PetriNetUnfolderBase]: For 81572/81574 co-relation queries the response was YES. [2024-06-04 15:33:28,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24768 conditions, 3607 events. 2410/3607 cut-off events. For 81572/81574 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17468 event pairs, 572 based on Foata normal form. 4/3610 useless extension candidates. Maximal degree in co-relation 24709. Up to 3153 conditions per place. [2024-06-04 15:33:28,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 63 changer transitions 0/209 dead transitions. [2024-06-04 15:33:28,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 2647 flow [2024-06-04 15:33:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:33:28,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-04 15:33:28,895 INFO L175 Difference]: Start difference. First operand has 123 places, 171 transitions, 2002 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:33:28,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 2647 flow [2024-06-04 15:33:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 209 transitions, 2557 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:29,013 INFO L231 Difference]: Finished difference. Result has 130 places, 174 transitions, 2093 flow [2024-06-04 15:33:29,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2093, PETRI_PLACES=130, PETRI_TRANSITIONS=174} [2024-06-04 15:33:29,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 15:33:29,014 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 174 transitions, 2093 flow [2024-06-04 15:33:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:29,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:29,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:33:29,014 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)] === [2024-06-04 15:33:29,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1723693101, now seen corresponding path program 3 times [2024-06-04 15:33:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:29,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904215139] [2024-06-04 15:33:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:29,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:29,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904215139] [2024-06-04 15:33:29,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904215139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:29,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:29,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:29,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389518796] [2024-06-04 15:33:29,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:29,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:29,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 174 transitions, 2093 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-04 15:33:29,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:29,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:29,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:30,526 INFO L124 PetriNetUnfolderBase]: 2403/3598 cut-off events. [2024-06-04 15:33:30,526 INFO L125 PetriNetUnfolderBase]: For 84672/84674 co-relation queries the response was YES. [2024-06-04 15:33:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 3598 events. 2403/3598 cut-off events. For 84672/84674 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17424 event pairs, 582 based on Foata normal form. 4/3601 useless extension candidates. Maximal degree in co-relation 24719. Up to 3232 conditions per place. [2024-06-04 15:33:30,604 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 149 selfloop transitions, 55 changer transitions 0/207 dead transitions. [2024-06-04 15:33:30,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2685 flow [2024-06-04 15:33:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:33:30,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-04 15:33:30,605 INFO L175 Difference]: Start difference. First operand has 130 places, 174 transitions, 2093 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:33:30,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2685 flow [2024-06-04 15:33:30,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 207 transitions, 2527 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:30,719 INFO L231 Difference]: Finished difference. Result has 131 places, 174 transitions, 2064 flow [2024-06-04 15:33:30,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2064, PETRI_PLACES=131, PETRI_TRANSITIONS=174} [2024-06-04 15:33:30,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-04 15:33:30,720 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 174 transitions, 2064 flow [2024-06-04 15:33:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-04 15:33:30,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:30,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:33:30,720 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:30,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1723700045, now seen corresponding path program 1 times [2024-06-04 15:33:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:30,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041218570] [2024-06-04 15:33:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:30,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041218570] [2024-06-04 15:33:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041218570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:31,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:31,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662062880] [2024-06-04 15:33:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:31,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:31,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 174 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:32,605 INFO L124 PetriNetUnfolderBase]: 2512/3777 cut-off events. [2024-06-04 15:33:32,606 INFO L125 PetriNetUnfolderBase]: For 98546/98548 co-relation queries the response was YES. [2024-06-04 15:33:32,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25803 conditions, 3777 events. 2512/3777 cut-off events. For 98546/98548 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18656 event pairs, 571 based on Foata normal form. 28/3804 useless extension candidates. Maximal degree in co-relation 25740. Up to 3173 conditions per place. [2024-06-04 15:33:32,633 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 147 selfloop transitions, 63 changer transitions 0/213 dead transitions. [2024-06-04 15:33:32,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 213 transitions, 2742 flow [2024-06-04 15:33:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:33:32,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-04 15:33:32,634 INFO L175 Difference]: Start difference. First operand has 131 places, 174 transitions, 2064 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:33:32,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 213 transitions, 2742 flow [2024-06-04 15:33:32,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 213 transitions, 2647 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:32,745 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2167 flow [2024-06-04 15:33:32,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2167, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-04 15:33:32,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-04 15:33:32,745 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2167 flow [2024-06-04 15:33:32,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:32,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:32,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:33:32,746 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)] === [2024-06-04 15:33:32,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash -681132245, now seen corresponding path program 2 times [2024-06-04 15:33:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:32,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260773159] [2024-06-04 15:33:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:33,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:33,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260773159] [2024-06-04 15:33:33,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260773159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:33,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:33,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:33,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229289973] [2024-06-04 15:33:33,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:33,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:33,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:33,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2167 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:33,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:33,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:33,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:34,614 INFO L124 PetriNetUnfolderBase]: 2529/3802 cut-off events. [2024-06-04 15:33:34,614 INFO L125 PetriNetUnfolderBase]: For 92291/92291 co-relation queries the response was YES. [2024-06-04 15:33:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26406 conditions, 3802 events. 2529/3802 cut-off events. For 92291/92291 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18753 event pairs, 649 based on Foata normal form. 4/3805 useless extension candidates. Maximal degree in co-relation 26343. Up to 3690 conditions per place. [2024-06-04 15:33:34,637 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-06-04 15:33:34,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 205 transitions, 2677 flow [2024-06-04 15:33:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:33:34,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:33:34,639 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2167 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:33:34,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 205 transitions, 2677 flow [2024-06-04 15:33:34,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 205 transitions, 2517 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:34,755 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 2108 flow [2024-06-04 15:33:34,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-04 15:33:34,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-04 15:33:34,755 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 2108 flow [2024-06-04 15:33:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:34,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:34,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:34,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:33:34,756 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)] === [2024-06-04 15:33:34,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250265, now seen corresponding path program 3 times [2024-06-04 15:33:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:34,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2812248] [2024-06-04 15:33:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:35,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:35,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2812248] [2024-06-04 15:33:35,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2812248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:35,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:35,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650964779] [2024-06-04 15:33:35,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:35,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:35,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:35,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:35,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:35,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 2108 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:35,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:35,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:35,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:36,599 INFO L124 PetriNetUnfolderBase]: 2546/3829 cut-off events. [2024-06-04 15:33:36,600 INFO L125 PetriNetUnfolderBase]: For 97996/97996 co-relation queries the response was YES. [2024-06-04 15:33:36,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26474 conditions, 3829 events. 2546/3829 cut-off events. For 97996/97996 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18900 event pairs, 654 based on Foata normal form. 4/3832 useless extension candidates. Maximal degree in co-relation 26410. Up to 3753 conditions per place. [2024-06-04 15:33:36,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-06-04 15:33:36,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 206 transitions, 2620 flow [2024-06-04 15:33:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:33:36,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:33:36,628 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 2108 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:33:36,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 206 transitions, 2620 flow [2024-06-04 15:33:36,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 206 transitions, 2537 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:36,764 INFO L231 Difference]: Finished difference. Result has 138 places, 181 transitions, 2116 flow [2024-06-04 15:33:36,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2116, PETRI_PLACES=138, PETRI_TRANSITIONS=181} [2024-06-04 15:33:36,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 15:33:36,764 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 181 transitions, 2116 flow [2024-06-04 15:33:36,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:36,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:36,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:36,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:33:36,765 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)] === [2024-06-04 15:33:36,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1294489275, now seen corresponding path program 4 times [2024-06-04 15:33:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:36,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165010123] [2024-06-04 15:33:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165010123] [2024-06-04 15:33:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165010123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:37,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68440966] [2024-06-04 15:33:37,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:37,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:37,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:37,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:37,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:37,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:37,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 181 transitions, 2116 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:37,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:37,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:37,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:38,538 INFO L124 PetriNetUnfolderBase]: 2563/3856 cut-off events. [2024-06-04 15:33:38,538 INFO L125 PetriNetUnfolderBase]: For 104622/104622 co-relation queries the response was YES. [2024-06-04 15:33:38,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26927 conditions, 3856 events. 2563/3856 cut-off events. For 104622/104622 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19106 event pairs, 639 based on Foata normal form. 4/3859 useless extension candidates. Maximal degree in co-relation 26862. Up to 3775 conditions per place. [2024-06-04 15:33:38,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-04 15:33:38,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 208 transitions, 2634 flow [2024-06-04 15:33:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:33:38,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-04 15:33:38,568 INFO L175 Difference]: Start difference. First operand has 138 places, 181 transitions, 2116 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:33:38,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 208 transitions, 2634 flow [2024-06-04 15:33:38,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 208 transitions, 2561 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:38,685 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2134 flow [2024-06-04 15:33:38,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2134, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-04 15:33:38,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-04 15:33:38,685 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2134 flow [2024-06-04 15:33:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:38,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:38,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:38,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:33:38,686 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)] === [2024-06-04 15:33:38,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1302524475, now seen corresponding path program 5 times [2024-06-04 15:33:38,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:38,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052083597] [2024-06-04 15:33:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:38,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:39,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052083597] [2024-06-04 15:33:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052083597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:39,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:39,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:39,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744778754] [2024-06-04 15:33:39,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:39,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:39,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:39,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:39,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2134 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:39,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:39,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:39,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:40,509 INFO L124 PetriNetUnfolderBase]: 2555/3844 cut-off events. [2024-06-04 15:33:40,509 INFO L125 PetriNetUnfolderBase]: For 109787/109787 co-relation queries the response was YES. [2024-06-04 15:33:40,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26983 conditions, 3844 events. 2555/3844 cut-off events. For 109787/109787 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19035 event pairs, 652 based on Foata normal form. 4/3847 useless extension candidates. Maximal degree in co-relation 26917. Up to 3741 conditions per place. [2024-06-04 15:33:40,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 23 changer transitions 0/210 dead transitions. [2024-06-04 15:33:40,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 210 transitions, 2662 flow [2024-06-04 15:33:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:33:40,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:33:40,535 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2134 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:33:40,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 210 transitions, 2662 flow [2024-06-04 15:33:40,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2589 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:40,659 INFO L231 Difference]: Finished difference. Result has 142 places, 185 transitions, 2171 flow [2024-06-04 15:33:40,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=142, PETRI_TRANSITIONS=185} [2024-06-04 15:33:40,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-04 15:33:40,660 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 185 transitions, 2171 flow [2024-06-04 15:33:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:40,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:40,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:40,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:33:40,661 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)] === [2024-06-04 15:33:40,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1302524227, now seen corresponding path program 1 times [2024-06-04 15:33:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:40,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756369814] [2024-06-04 15:33:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:40,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:41,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756369814] [2024-06-04 15:33:41,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756369814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:41,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193000198] [2024-06-04 15:33:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:41,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:41,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:41,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 185 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:41,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:41,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:41,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:42,347 INFO L124 PetriNetUnfolderBase]: 2547/3833 cut-off events. [2024-06-04 15:33:42,348 INFO L125 PetriNetUnfolderBase]: For 114796/114800 co-relation queries the response was YES. [2024-06-04 15:33:42,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27114 conditions, 3833 events. 2547/3833 cut-off events. For 114796/114800 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18935 event pairs, 656 based on Foata normal form. 6/3838 useless extension candidates. Maximal degree in co-relation 27047. Up to 3733 conditions per place. [2024-06-04 15:33:42,377 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 24 changer transitions 0/207 dead transitions. [2024-06-04 15:33:42,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2656 flow [2024-06-04 15:33:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:33:42,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:33:42,378 INFO L175 Difference]: Start difference. First operand has 142 places, 185 transitions, 2171 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:33:42,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2656 flow [2024-06-04 15:33:42,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2548 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:42,539 INFO L231 Difference]: Finished difference. Result has 144 places, 186 transitions, 2146 flow [2024-06-04 15:33:42,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=144, PETRI_TRANSITIONS=186} [2024-06-04 15:33:42,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 15:33:42,540 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 186 transitions, 2146 flow [2024-06-04 15:33:42,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:42,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:42,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:42,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:33:42,540 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)] === [2024-06-04 15:33:42,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -651811801, now seen corresponding path program 1 times [2024-06-04 15:33:42,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:42,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143103418] [2024-06-04 15:33:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:43,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143103418] [2024-06-04 15:33:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143103418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:43,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055730944] [2024-06-04 15:33:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:43,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:43,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 186 transitions, 2146 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:43,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:44,017 INFO L124 PetriNetUnfolderBase]: 2526/3802 cut-off events. [2024-06-04 15:33:44,018 INFO L125 PetriNetUnfolderBase]: For 110281/110281 co-relation queries the response was YES. [2024-06-04 15:33:44,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26513 conditions, 3802 events. 2526/3802 cut-off events. For 110281/110281 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18754 event pairs, 629 based on Foata normal form. 4/3805 useless extension candidates. Maximal degree in co-relation 26445. Up to 3742 conditions per place. [2024-06-04 15:33:44,048 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 188 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-06-04 15:33:44,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2714 flow [2024-06-04 15:33:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:33:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:33:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-04 15:33:44,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:33:44,049 INFO L175 Difference]: Start difference. First operand has 144 places, 186 transitions, 2146 flow. Second operand 5 states and 90 transitions. [2024-06-04 15:33:44,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2714 flow [2024-06-04 15:33:44,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 209 transitions, 2668 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:44,184 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 2248 flow [2024-06-04 15:33:44,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2248, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-06-04 15:33:44,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 15:33:44,184 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 2248 flow [2024-06-04 15:33:44,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:44,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:44,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:44,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:33:44,185 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:44,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:44,185 INFO L85 PathProgramCache]: Analyzing trace with hash -909303145, now seen corresponding path program 1 times [2024-06-04 15:33:44,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:44,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068076042] [2024-06-04 15:33:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068076042] [2024-06-04 15:33:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068076042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410214316] [2024-06-04 15:33:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:44,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:44,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:45,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:45,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 2248 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:45,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:45,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:45,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:45,878 INFO L124 PetriNetUnfolderBase]: 2670/4044 cut-off events. [2024-06-04 15:33:45,878 INFO L125 PetriNetUnfolderBase]: For 131984/131986 co-relation queries the response was YES. [2024-06-04 15:33:45,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28681 conditions, 4044 events. 2670/4044 cut-off events. For 131984/131986 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20434 event pairs, 459 based on Foata normal form. 16/4059 useless extension candidates. Maximal degree in co-relation 28612. Up to 2696 conditions per place. [2024-06-04 15:33:45,905 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 65 changer transitions 0/233 dead transitions. [2024-06-04 15:33:45,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 233 transitions, 3012 flow [2024-06-04 15:33:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:33:45,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:33:45,907 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 2248 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:33:45,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 233 transitions, 3012 flow [2024-06-04 15:33:46,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 233 transitions, 2961 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:46,043 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 2387 flow [2024-06-04 15:33:46,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2387, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-04 15:33:46,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 15:33:46,045 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 2387 flow [2024-06-04 15:33:46,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:46,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:46,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:46,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:33:46,045 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:46,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -907429195, now seen corresponding path program 2 times [2024-06-04 15:33:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:46,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131992429] [2024-06-04 15:33:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:46,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131992429] [2024-06-04 15:33:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131992429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:46,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:46,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795751079] [2024-06-04 15:33:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:46,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:46,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:46,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 2387 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:46,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:46,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:46,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:47,749 INFO L124 PetriNetUnfolderBase]: 2900/4426 cut-off events. [2024-06-04 15:33:47,749 INFO L125 PetriNetUnfolderBase]: For 158003/158005 co-relation queries the response was YES. [2024-06-04 15:33:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31951 conditions, 4426 events. 2900/4426 cut-off events. For 158003/158005 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23219 event pairs, 680 based on Foata normal form. 16/4441 useless extension candidates. Maximal degree in co-relation 31881. Up to 3427 conditions per place. [2024-06-04 15:33:47,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 66 changer transitions 0/235 dead transitions. [2024-06-04 15:33:47,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 235 transitions, 3166 flow [2024-06-04 15:33:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:33:47,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-04 15:33:47,783 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 2387 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:33:47,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 235 transitions, 3166 flow [2024-06-04 15:33:47,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 235 transitions, 3074 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:47,960 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2530 flow [2024-06-04 15:33:47,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-04 15:33:47,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 15:33:47,960 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2530 flow [2024-06-04 15:33:47,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:47,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:47,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:47,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:33:47,961 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:47,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash -820589515, now seen corresponding path program 3 times [2024-06-04 15:33:47,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:47,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083767575] [2024-06-04 15:33:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:47,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:48,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:48,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083767575] [2024-06-04 15:33:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083767575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:48,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042323177] [2024-06-04 15:33:48,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:48,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:48,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:48,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:48,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2530 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:48,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:48,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:48,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:49,838 INFO L124 PetriNetUnfolderBase]: 2864/4370 cut-off events. [2024-06-04 15:33:49,838 INFO L125 PetriNetUnfolderBase]: For 158603/158605 co-relation queries the response was YES. [2024-06-04 15:33:49,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31604 conditions, 4370 events. 2864/4370 cut-off events. For 158603/158605 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22857 event pairs, 703 based on Foata normal form. 20/4389 useless extension candidates. Maximal degree in co-relation 31531. Up to 3923 conditions per place. [2024-06-04 15:33:49,874 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 176 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-04 15:33:49,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 230 transitions, 3086 flow [2024-06-04 15:33:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:33:49,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-04 15:33:49,876 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2530 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:33:49,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 230 transitions, 3086 flow [2024-06-04 15:33:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 230 transitions, 3003 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:50,126 INFO L231 Difference]: Finished difference. Result has 158 places, 196 transitions, 2559 flow [2024-06-04 15:33:50,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2559, PETRI_PLACES=158, PETRI_TRANSITIONS=196} [2024-06-04 15:33:50,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 15:33:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 196 transitions, 2559 flow [2024-06-04 15:33:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:50,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:50,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:33:50,127 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)] === [2024-06-04 15:33:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1541678411, now seen corresponding path program 4 times [2024-06-04 15:33:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923651863] [2024-06-04 15:33:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923651863] [2024-06-04 15:33:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923651863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272606232] [2024-06-04 15:33:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:51,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:51,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:51,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 196 transitions, 2559 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:33:51,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:51,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:51,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:52,326 INFO L124 PetriNetUnfolderBase]: 3008/4610 cut-off events. [2024-06-04 15:33:52,326 INFO L125 PetriNetUnfolderBase]: For 174064/174066 co-relation queries the response was YES. [2024-06-04 15:33:52,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33707 conditions, 4610 events. 3008/4610 cut-off events. For 174064/174066 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24577 event pairs, 609 based on Foata normal form. 16/4625 useless extension candidates. Maximal degree in co-relation 33632. Up to 3690 conditions per place. [2024-06-04 15:33:52,364 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2024-06-04 15:33:52,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 249 transitions, 3399 flow [2024-06-04 15:33:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:33:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:33:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:33:52,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-04 15:33:52,366 INFO L175 Difference]: Start difference. First operand has 158 places, 196 transitions, 2559 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:33:52,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 249 transitions, 3399 flow [2024-06-04 15:33:52,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 249 transitions, 3266 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 15:33:52,622 INFO L231 Difference]: Finished difference. Result has 160 places, 198 transitions, 2614 flow [2024-06-04 15:33:52,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2614, PETRI_PLACES=160, PETRI_TRANSITIONS=198} [2024-06-04 15:33:52,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-04 15:33:52,622 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 198 transitions, 2614 flow [2024-06-04 15:33:52,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:33:52,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:52,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:52,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:33:52,623 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)] === [2024-06-04 15:33:52,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1889372939, now seen corresponding path program 5 times [2024-06-04 15:33:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:52,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903069382] [2024-06-04 15:33:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903069382] [2024-06-04 15:33:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903069382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:53,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:53,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947073447] [2024-06-04 15:33:53,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:53,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:53,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:53,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 198 transitions, 2614 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:53,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:53,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:53,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:54,399 INFO L124 PetriNetUnfolderBase]: 3050/4684 cut-off events. [2024-06-04 15:33:54,399 INFO L125 PetriNetUnfolderBase]: For 184502/184504 co-relation queries the response was YES. [2024-06-04 15:33:54,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34224 conditions, 4684 events. 3050/4684 cut-off events. For 184502/184504 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25220 event pairs, 739 based on Foata normal form. 24/4707 useless extension candidates. Maximal degree in co-relation 34148. Up to 4102 conditions per place. [2024-06-04 15:33:54,435 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 168 selfloop transitions, 66 changer transitions 0/237 dead transitions. [2024-06-04 15:33:54,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 237 transitions, 3240 flow [2024-06-04 15:33:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:33:54,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:33:54,436 INFO L175 Difference]: Start difference. First operand has 160 places, 198 transitions, 2614 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:33:54,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 237 transitions, 3240 flow [2024-06-04 15:33:54,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 237 transitions, 3138 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:54,652 INFO L231 Difference]: Finished difference. Result has 163 places, 200 transitions, 2705 flow [2024-06-04 15:33:54,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=163, PETRI_TRANSITIONS=200} [2024-06-04 15:33:54,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-04 15:33:54,653 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 200 transitions, 2705 flow [2024-06-04 15:33:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:54,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:54,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:33:54,653 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)] === [2024-06-04 15:33:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1535960399, now seen corresponding path program 1 times [2024-06-04 15:33:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426629361] [2024-06-04 15:33:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426629361] [2024-06-04 15:33:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426629361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854490920] [2024-06-04 15:33:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:55,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:55,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 200 transitions, 2705 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:33:55,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:55,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:55,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:56,571 INFO L124 PetriNetUnfolderBase]: 3067/4711 cut-off events. [2024-06-04 15:33:56,571 INFO L125 PetriNetUnfolderBase]: For 182081/182083 co-relation queries the response was YES. [2024-06-04 15:33:56,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34833 conditions, 4711 events. 3067/4711 cut-off events. For 182081/182083 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25376 event pairs, 735 based on Foata normal form. 4/4714 useless extension candidates. Maximal degree in co-relation 34756. Up to 4249 conditions per place. [2024-06-04 15:33:56,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 65 changer transitions 0/232 dead transitions. [2024-06-04 15:33:56,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 232 transitions, 3293 flow [2024-06-04 15:33:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:33:56,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:33:56,609 INFO L175 Difference]: Start difference. First operand has 163 places, 200 transitions, 2705 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:33:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 232 transitions, 3293 flow [2024-06-04 15:33:56,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 232 transitions, 3134 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:56,925 INFO L231 Difference]: Finished difference. Result has 165 places, 202 transitions, 2737 flow [2024-06-04 15:33:56,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2737, PETRI_PLACES=165, PETRI_TRANSITIONS=202} [2024-06-04 15:33:56,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 15:33:56,925 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 202 transitions, 2737 flow [2024-06-04 15:33:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:33:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:56,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:33:56,926 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:56,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1541530541, now seen corresponding path program 6 times [2024-06-04 15:33:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573735332] [2024-06-04 15:33:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573735332] [2024-06-04 15:33:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573735332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:57,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733508944] [2024-06-04 15:33:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:57,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:57,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:57,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 202 transitions, 2737 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:57,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:57,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:57,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:58,711 INFO L124 PetriNetUnfolderBase]: 3031/4655 cut-off events. [2024-06-04 15:33:58,711 INFO L125 PetriNetUnfolderBase]: For 187008/187010 co-relation queries the response was YES. [2024-06-04 15:33:58,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34044 conditions, 4655 events. 3031/4655 cut-off events. For 187008/187010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24940 event pairs, 612 based on Foata normal form. 20/4674 useless extension candidates. Maximal degree in co-relation 33966. Up to 4110 conditions per place. [2024-06-04 15:33:58,810 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 179 selfloop transitions, 60 changer transitions 0/242 dead transitions. [2024-06-04 15:33:58,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 242 transitions, 3333 flow [2024-06-04 15:33:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:33:58,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-04 15:33:58,811 INFO L175 Difference]: Start difference. First operand has 165 places, 202 transitions, 2737 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:33:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 242 transitions, 3333 flow [2024-06-04 15:33:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 3158 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:59,093 INFO L231 Difference]: Finished difference. Result has 167 places, 202 transitions, 2695 flow [2024-06-04 15:33:59,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2695, PETRI_PLACES=167, PETRI_TRANSITIONS=202} [2024-06-04 15:33:59,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-04 15:33:59,094 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 202 transitions, 2695 flow [2024-06-04 15:33:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:59,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:59,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:33:59,094 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:59,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1895094671, now seen corresponding path program 2 times [2024-06-04 15:33:59,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098447536] [2024-06-04 15:33:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:00,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:00,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098447536] [2024-06-04 15:34:00,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098447536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:00,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:00,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:00,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985928649] [2024-06-04 15:34:00,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:00,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:00,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:00,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 202 transitions, 2695 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:00,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:00,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:00,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:01,038 INFO L124 PetriNetUnfolderBase]: 3048/4682 cut-off events. [2024-06-04 15:34:01,039 INFO L125 PetriNetUnfolderBase]: For 187316/187318 co-relation queries the response was YES. [2024-06-04 15:34:01,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34377 conditions, 4682 events. 3048/4682 cut-off events. For 187316/187318 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25221 event pairs, 697 based on Foata normal form. 4/4685 useless extension candidates. Maximal degree in co-relation 34298. Up to 3875 conditions per place. [2024-06-04 15:34:01,076 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 72 changer transitions 0/238 dead transitions. [2024-06-04 15:34:01,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 238 transitions, 3317 flow [2024-06-04 15:34:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:34:01,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-04 15:34:01,077 INFO L175 Difference]: Start difference. First operand has 167 places, 202 transitions, 2695 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:34:01,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 238 transitions, 3317 flow [2024-06-04 15:34:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3184 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:01,399 INFO L231 Difference]: Finished difference. Result has 168 places, 204 transitions, 2770 flow [2024-06-04 15:34:01,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2770, PETRI_PLACES=168, PETRI_TRANSITIONS=204} [2024-06-04 15:34:01,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 15:34:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 204 transitions, 2770 flow [2024-06-04 15:34:01,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:01,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:34:01,400 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:01,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1165268669, now seen corresponding path program 3 times [2024-06-04 15:34:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:01,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038536897] [2024-06-04 15:34:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:02,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038536897] [2024-06-04 15:34:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038536897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:02,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96203784] [2024-06-04 15:34:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:02,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:02,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 204 transitions, 2770 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:02,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:02,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:02,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:03,432 INFO L124 PetriNetUnfolderBase]: 3065/4709 cut-off events. [2024-06-04 15:34:03,433 INFO L125 PetriNetUnfolderBase]: For 196624/196628 co-relation queries the response was YES. [2024-06-04 15:34:03,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35034 conditions, 4709 events. 3065/4709 cut-off events. For 196624/196628 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25387 event pairs, 814 based on Foata normal form. 8/4716 useless extension candidates. Maximal degree in co-relation 34954. Up to 4608 conditions per place. [2024-06-04 15:34:03,472 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 21 changer transitions 0/232 dead transitions. [2024-06-04 15:34:03,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 3352 flow [2024-06-04 15:34:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:03,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:03,473 INFO L175 Difference]: Start difference. First operand has 168 places, 204 transitions, 2770 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:03,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 3352 flow [2024-06-04 15:34:03,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 232 transitions, 3166 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:03,820 INFO L231 Difference]: Finished difference. Result has 170 places, 206 transitions, 2693 flow [2024-06-04 15:34:03,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2693, PETRI_PLACES=170, PETRI_TRANSITIONS=206} [2024-06-04 15:34:03,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-04 15:34:03,821 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 206 transitions, 2693 flow [2024-06-04 15:34:03,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:03,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:03,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:34:03,821 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)] === [2024-06-04 15:34:03,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1165261229, now seen corresponding path program 4 times [2024-06-04 15:34:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693875460] [2024-06-04 15:34:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:04,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:04,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693875460] [2024-06-04 15:34:04,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693875460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:04,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:04,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743141434] [2024-06-04 15:34:04,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:04,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:04,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:04,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:04,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 206 transitions, 2693 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:04,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:04,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:05,842 INFO L124 PetriNetUnfolderBase]: 3082/4736 cut-off events. [2024-06-04 15:34:05,842 INFO L125 PetriNetUnfolderBase]: For 207598/207602 co-relation queries the response was YES. [2024-06-04 15:34:05,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35205 conditions, 4736 events. 3082/4736 cut-off events. For 207598/207602 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25576 event pairs, 819 based on Foata normal form. 8/4743 useless extension candidates. Maximal degree in co-relation 35124. Up to 4594 conditions per place. [2024-06-04 15:34:05,884 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 24 changer transitions 0/234 dead transitions. [2024-06-04 15:34:05,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 3279 flow [2024-06-04 15:34:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:34:05,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:34:05,886 INFO L175 Difference]: Start difference. First operand has 170 places, 206 transitions, 2693 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:34:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 3279 flow [2024-06-04 15:34:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 234 transitions, 3192 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:06,292 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2723 flow [2024-06-04 15:34:06,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2723, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-04 15:34:06,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-04 15:34:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2723 flow [2024-06-04 15:34:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:06,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:06,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:34:06,294 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)] === [2024-06-04 15:34:06,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1324549021, now seen corresponding path program 5 times [2024-06-04 15:34:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:06,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019916420] [2024-06-04 15:34:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019916420] [2024-06-04 15:34:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019916420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:07,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884120167] [2024-06-04 15:34:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:07,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:07,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2723 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:07,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:07,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:07,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:08,478 INFO L124 PetriNetUnfolderBase]: 3074/4723 cut-off events. [2024-06-04 15:34:08,478 INFO L125 PetriNetUnfolderBase]: For 213927/213931 co-relation queries the response was YES. [2024-06-04 15:34:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 4723 events. 3074/4723 cut-off events. For 213927/213931 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25505 event pairs, 808 based on Foata normal form. 8/4730 useless extension candidates. Maximal degree in co-relation 35116. Up to 4499 conditions per place. [2024-06-04 15:34:08,518 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 34 changer transitions 0/240 dead transitions. [2024-06-04 15:34:08,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 3549 flow [2024-06-04 15:34:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:34:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:34:08,519 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2723 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:34:08,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 3549 flow [2024-06-04 15:34:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 3452 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:08,928 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2846 flow [2024-06-04 15:34:08,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-04 15:34:08,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 15:34:08,928 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2846 flow [2024-06-04 15:34:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:08,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:08,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:34:08,929 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)] === [2024-06-04 15:34:08,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1416126177, now seen corresponding path program 6 times [2024-06-04 15:34:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129350236] [2024-06-04 15:34:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129350236] [2024-06-04 15:34:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129350236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:09,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:09,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:09,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766873631] [2024-06-04 15:34:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:10,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:10,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2846 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:10,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:10,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:10,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:11,033 INFO L124 PetriNetUnfolderBase]: 3066/4711 cut-off events. [2024-06-04 15:34:11,034 INFO L125 PetriNetUnfolderBase]: For 220526/220530 co-relation queries the response was YES. [2024-06-04 15:34:11,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35268 conditions, 4711 events. 3066/4711 cut-off events. For 220526/220530 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25400 event pairs, 811 based on Foata normal form. 8/4718 useless extension candidates. Maximal degree in co-relation 35184. Up to 4575 conditions per place. [2024-06-04 15:34:11,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 28 changer transitions 0/238 dead transitions. [2024-06-04 15:34:11,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 238 transitions, 3384 flow [2024-06-04 15:34:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:11,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:11,075 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2846 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:11,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 238 transitions, 3384 flow [2024-06-04 15:34:11,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 238 transitions, 3258 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:11,550 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2786 flow [2024-06-04 15:34:11,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2786, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-04 15:34:11,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-04 15:34:11,551 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2786 flow [2024-06-04 15:34:11,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:11,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:11,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:34:11,551 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:11,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1324289551, now seen corresponding path program 7 times [2024-06-04 15:34:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979217655] [2024-06-04 15:34:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979217655] [2024-06-04 15:34:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979217655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:12,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:12,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311306658] [2024-06-04 15:34:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:12,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:12,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2786 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:12,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:12,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:12,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:13,561 INFO L124 PetriNetUnfolderBase]: 3058/4699 cut-off events. [2024-06-04 15:34:13,561 INFO L125 PetriNetUnfolderBase]: For 223643/223647 co-relation queries the response was YES. [2024-06-04 15:34:13,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 4699 events. 3058/4699 cut-off events. For 223643/223647 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25295 event pairs, 761 based on Foata normal form. 8/4706 useless extension candidates. Maximal degree in co-relation 34922. Up to 4594 conditions per place. [2024-06-04 15:34:13,600 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-04 15:34:13,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 240 transitions, 3384 flow [2024-06-04 15:34:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:34:13,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:34:13,601 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2786 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:34:13,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 240 transitions, 3384 flow [2024-06-04 15:34:13,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 240 transitions, 3320 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:13,948 INFO L231 Difference]: Finished difference. Result has 180 places, 214 transitions, 2829 flow [2024-06-04 15:34:13,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2829, PETRI_PLACES=180, PETRI_TRANSITIONS=214} [2024-06-04 15:34:13,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 15:34:13,949 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 214 transitions, 2829 flow [2024-06-04 15:34:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-04 15:34:13,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:13,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:34:13,949 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:13,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1520341587, now seen corresponding path program 1 times [2024-06-04 15:34:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:13,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553592392] [2024-06-04 15:34:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553592392] [2024-06-04 15:34:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553592392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:14,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88686943] [2024-06-04 15:34:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:14,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 214 transitions, 2829 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:14,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:14,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:14,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:15,638 INFO L124 PetriNetUnfolderBase]: 3019/4639 cut-off events. [2024-06-04 15:34:15,638 INFO L125 PetriNetUnfolderBase]: For 232794/232798 co-relation queries the response was YES. [2024-06-04 15:34:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34647 conditions, 4639 events. 3019/4639 cut-off events. For 232794/232798 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24924 event pairs, 759 based on Foata normal form. 12/4650 useless extension candidates. Maximal degree in co-relation 34560. Up to 4327 conditions per place. [2024-06-04 15:34:15,673 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 56 changer transitions 0/251 dead transitions. [2024-06-04 15:34:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3731 flow [2024-06-04 15:34:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-04 15:34:15,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-04 15:34:15,675 INFO L175 Difference]: Start difference. First operand has 180 places, 214 transitions, 2829 flow. Second operand 6 states and 115 transitions. [2024-06-04 15:34:15,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3731 flow [2024-06-04 15:34:16,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 3642 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:16,046 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 3144 flow [2024-06-04 15:34:16,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3144, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-04 15:34:16,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-04 15:34:16,047 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 3144 flow [2024-06-04 15:34:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:16,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:16,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:34:16,048 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:16,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash 558532967, now seen corresponding path program 1 times [2024-06-04 15:34:16,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:16,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546554594] [2024-06-04 15:34:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:16,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:16,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546554594] [2024-06-04 15:34:16,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546554594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:16,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:16,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956853156] [2024-06-04 15:34:16,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:16,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:16,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:16,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:16,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:16,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:16,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 3144 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:16,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:16,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:16,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:17,723 INFO L124 PetriNetUnfolderBase]: 3029/4652 cut-off events. [2024-06-04 15:34:17,723 INFO L125 PetriNetUnfolderBase]: For 239151/239151 co-relation queries the response was YES. [2024-06-04 15:34:17,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35594 conditions, 4652 events. 3029/4652 cut-off events. For 239151/239151 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25016 event pairs, 780 based on Foata normal form. 2/4653 useless extension candidates. Maximal degree in co-relation 35505. Up to 4587 conditions per place. [2024-06-04 15:34:17,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 23 changer transitions 0/255 dead transitions. [2024-06-04 15:34:17,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 255 transitions, 3923 flow [2024-06-04 15:34:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:34:17,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:17,763 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 3144 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:34:17,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 255 transitions, 3923 flow [2024-06-04 15:34:18,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 3838 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-04 15:34:18,240 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 3274 flow [2024-06-04 15:34:18,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3274, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-04 15:34:18,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-04 15:34:18,240 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 3274 flow [2024-06-04 15:34:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:18,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:18,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:34:18,240 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:18,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1435810825, now seen corresponding path program 2 times [2024-06-04 15:34:18,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:18,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141539988] [2024-06-04 15:34:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:19,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141539988] [2024-06-04 15:34:19,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141539988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:19,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:19,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650138669] [2024-06-04 15:34:19,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:19,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:19,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:19,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 3274 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:19,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:19,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:19,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:20,041 INFO L124 PetriNetUnfolderBase]: 3074/4715 cut-off events. [2024-06-04 15:34:20,041 INFO L125 PetriNetUnfolderBase]: For 251759/251759 co-relation queries the response was YES. [2024-06-04 15:34:20,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36401 conditions, 4715 events. 3074/4715 cut-off events. For 251759/251759 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25321 event pairs, 784 based on Foata normal form. 6/4720 useless extension candidates. Maximal degree in co-relation 36308. Up to 4640 conditions per place. [2024-06-04 15:34:20,098 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 33 changer transitions 0/267 dead transitions. [2024-06-04 15:34:20,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 267 transitions, 4039 flow [2024-06-04 15:34:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:34:20,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:34:20,099 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 3274 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:34:20,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 267 transitions, 4039 flow [2024-06-04 15:34:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 267 transitions, 3971 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-04 15:34:20,593 INFO L231 Difference]: Finished difference. Result has 194 places, 249 transitions, 3477 flow [2024-06-04 15:34:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3477, PETRI_PLACES=194, PETRI_TRANSITIONS=249} [2024-06-04 15:34:20,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 15:34:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 249 transitions, 3477 flow [2024-06-04 15:34:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:34:20,594 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:20,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash -864725963, now seen corresponding path program 3 times [2024-06-04 15:34:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528383317] [2024-06-04 15:34:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528383317] [2024-06-04 15:34:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528383317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:21,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:21,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818514468] [2024-06-04 15:34:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:21,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:21,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 249 transitions, 3477 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:21,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:21,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:22,489 INFO L124 PetriNetUnfolderBase]: 3088/4735 cut-off events. [2024-06-04 15:34:22,489 INFO L125 PetriNetUnfolderBase]: For 259604/259604 co-relation queries the response was YES. [2024-06-04 15:34:22,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36993 conditions, 4735 events. 3088/4735 cut-off events. For 259604/259604 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25434 event pairs, 789 based on Foata normal form. 6/4740 useless extension candidates. Maximal degree in co-relation 36897. Up to 4620 conditions per place. [2024-06-04 15:34:22,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-04 15:34:22,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 270 transitions, 4110 flow [2024-06-04 15:34:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:34:22,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:34:22,535 INFO L175 Difference]: Start difference. First operand has 194 places, 249 transitions, 3477 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:34:22,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 270 transitions, 4110 flow [2024-06-04 15:34:23,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 270 transitions, 3951 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:23,081 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3484 flow [2024-06-04 15:34:23,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3484, PETRI_PLACES=196, PETRI_TRANSITIONS=252} [2024-06-04 15:34:23,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-04 15:34:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3484 flow [2024-06-04 15:34:23,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:23,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:23,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:34:23,082 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:23,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash 971201951, now seen corresponding path program 1 times [2024-06-04 15:34:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:23,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243481713] [2024-06-04 15:34:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243481713] [2024-06-04 15:34:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243481713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40421353] [2024-06-04 15:34:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:24,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:24,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 252 transitions, 3484 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:24,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:24,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:24,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:25,351 INFO L124 PetriNetUnfolderBase]: 3083/4728 cut-off events. [2024-06-04 15:34:25,351 INFO L125 PetriNetUnfolderBase]: For 263443/263443 co-relation queries the response was YES. [2024-06-04 15:34:25,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37294 conditions, 4728 events. 3083/4728 cut-off events. For 263443/263443 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25312 event pairs, 790 based on Foata normal form. 2/4729 useless extension candidates. Maximal degree in co-relation 37197. Up to 4700 conditions per place. [2024-06-04 15:34:25,480 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 249 selfloop transitions, 12 changer transitions 0/264 dead transitions. [2024-06-04 15:34:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 4069 flow [2024-06-04 15:34:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:34:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:34:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-04 15:34:25,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-04 15:34:25,481 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3484 flow. Second operand 5 states and 81 transitions. [2024-06-04 15:34:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 4069 flow [2024-06-04 15:34:26,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 264 transitions, 3971 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:26,052 INFO L231 Difference]: Finished difference. Result has 197 places, 254 transitions, 3455 flow [2024-06-04 15:34:26,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3455, PETRI_PLACES=197, PETRI_TRANSITIONS=254} [2024-06-04 15:34:26,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-04 15:34:26,053 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 254 transitions, 3455 flow [2024-06-04 15:34:26,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:26,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:26,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:26,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:34:26,054 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:26,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 331714182, now seen corresponding path program 1 times [2024-06-04 15:34:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:26,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872528179] [2024-06-04 15:34:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:26,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872528179] [2024-06-04 15:34:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872528179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684830041] [2024-06-04 15:34:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:27,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:27,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 254 transitions, 3455 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:34:27,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:27,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:28,353 INFO L124 PetriNetUnfolderBase]: 3063/4698 cut-off events. [2024-06-04 15:34:28,353 INFO L125 PetriNetUnfolderBase]: For 259882/259884 co-relation queries the response was YES. [2024-06-04 15:34:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36265 conditions, 4698 events. 3063/4698 cut-off events. For 259882/259884 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25162 event pairs, 683 based on Foata normal form. 12/4709 useless extension candidates. Maximal degree in co-relation 36167. Up to 4316 conditions per place. [2024-06-04 15:34:28,401 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 46 changer transitions 0/287 dead transitions. [2024-06-04 15:34:28,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 287 transitions, 4127 flow [2024-06-04 15:34:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:34:28,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:34:28,403 INFO L175 Difference]: Start difference. First operand has 197 places, 254 transitions, 3455 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:34:28,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 287 transitions, 4127 flow [2024-06-04 15:34:28,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 287 transitions, 4066 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:28,915 INFO L231 Difference]: Finished difference. Result has 203 places, 255 transitions, 3512 flow [2024-06-04 15:34:28,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3512, PETRI_PLACES=203, PETRI_TRANSITIONS=255} [2024-06-04 15:34:28,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 15:34:28,915 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 255 transitions, 3512 flow [2024-06-04 15:34:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:34:28,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:28,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:34:28,916 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)] === [2024-06-04 15:34:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -210957852, now seen corresponding path program 1 times [2024-06-04 15:34:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:28,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896659751] [2024-06-04 15:34:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896659751] [2024-06-04 15:34:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896659751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312090001] [2024-06-04 15:34:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:30,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:30,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 255 transitions, 3512 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:30,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:30,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:30,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:31,265 INFO L124 PetriNetUnfolderBase]: 3103/4753 cut-off events. [2024-06-04 15:34:31,265 INFO L125 PetriNetUnfolderBase]: For 259618/259622 co-relation queries the response was YES. [2024-06-04 15:34:31,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37049 conditions, 4753 events. 3103/4753 cut-off events. For 259618/259622 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25486 event pairs, 758 based on Foata normal form. 6/4758 useless extension candidates. Maximal degree in co-relation 36949. Up to 4491 conditions per place. [2024-06-04 15:34:31,312 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 250 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-04 15:34:31,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 300 transitions, 4362 flow [2024-06-04 15:34:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:34:31,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-04 15:34:31,313 INFO L175 Difference]: Start difference. First operand has 203 places, 255 transitions, 3512 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:34:31,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 300 transitions, 4362 flow [2024-06-04 15:34:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 4248 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:31,821 INFO L231 Difference]: Finished difference. Result has 206 places, 263 transitions, 3629 flow [2024-06-04 15:34:31,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3629, PETRI_PLACES=206, PETRI_TRANSITIONS=263} [2024-06-04 15:34:31,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-04 15:34:31,821 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 263 transitions, 3629 flow [2024-06-04 15:34:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:31,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:31,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:31,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:34:31,822 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:31,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash -542621144, now seen corresponding path program 2 times [2024-06-04 15:34:31,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:31,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761491759] [2024-06-04 15:34:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761491759] [2024-06-04 15:34:32,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761491759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:32,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:32,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:32,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763153990] [2024-06-04 15:34:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:32,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:33,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:33,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 263 transitions, 3629 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:34:33,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:33,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:33,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:34,102 INFO L124 PetriNetUnfolderBase]: 3083/4722 cut-off events. [2024-06-04 15:34:34,102 INFO L125 PetriNetUnfolderBase]: For 265802/265804 co-relation queries the response was YES. [2024-06-04 15:34:34,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36861 conditions, 4722 events. 3083/4722 cut-off events. For 265802/265804 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25261 event pairs, 686 based on Foata normal form. 12/4733 useless extension candidates. Maximal degree in co-relation 36760. Up to 4274 conditions per place. [2024-06-04 15:34:34,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-06-04 15:34:34,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 299 transitions, 4335 flow [2024-06-04 15:34:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:34:34,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-04 15:34:34,146 INFO L175 Difference]: Start difference. First operand has 206 places, 263 transitions, 3629 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:34:34,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 299 transitions, 4335 flow [2024-06-04 15:34:34,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 299 transitions, 4172 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:34,789 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3613 flow [2024-06-04 15:34:34,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-04 15:34:34,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 15:34:34,790 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3613 flow [2024-06-04 15:34:34,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:34:34,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:34,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:34,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:34:34,790 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:34,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1381606484, now seen corresponding path program 3 times [2024-06-04 15:34:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451339754] [2024-06-04 15:34:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:34,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:36,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451339754] [2024-06-04 15:34:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451339754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:36,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:36,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:34:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691153831] [2024-06-04 15:34:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:36,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:34:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:34:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:34:36,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:36,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3613 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:36,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:36,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:37,263 INFO L124 PetriNetUnfolderBase]: 3124/4793 cut-off events. [2024-06-04 15:34:37,263 INFO L125 PetriNetUnfolderBase]: For 277285/277287 co-relation queries the response was YES. [2024-06-04 15:34:37,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37424 conditions, 4793 events. 3124/4793 cut-off events. For 277285/277287 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25814 event pairs, 655 based on Foata normal form. 12/4804 useless extension candidates. Maximal degree in co-relation 37321. Up to 3917 conditions per place. [2024-06-04 15:34:37,315 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 75 changer transitions 0/306 dead transitions. [2024-06-04 15:34:37,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 306 transitions, 4385 flow [2024-06-04 15:34:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:34:37,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-04 15:34:37,317 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3613 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:34:37,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 306 transitions, 4385 flow [2024-06-04 15:34:37,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 4235 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:37,888 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 3655 flow [2024-06-04 15:34:37,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3655, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-06-04 15:34:37,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 15:34:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 3655 flow [2024-06-04 15:34:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:37,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:37,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:37,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:34:37,890 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)] === [2024-06-04 15:34:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 138365092, now seen corresponding path program 1 times [2024-06-04 15:34:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:37,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266698770] [2024-06-04 15:34:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:38,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:38,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266698770] [2024-06-04 15:34:38,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266698770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:38,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069416959] [2024-06-04 15:34:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:38,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:38,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 3655 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:38,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:38,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:39,611 INFO L124 PetriNetUnfolderBase]: 3144/4819 cut-off events. [2024-06-04 15:34:39,611 INFO L125 PetriNetUnfolderBase]: For 278464/278464 co-relation queries the response was YES. [2024-06-04 15:34:39,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37893 conditions, 4819 events. 3144/4819 cut-off events. For 278464/278464 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25965 event pairs, 776 based on Foata normal form. 4/4822 useless extension candidates. Maximal degree in co-relation 37790. Up to 4752 conditions per place. [2024-06-04 15:34:39,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 253 selfloop transitions, 32 changer transitions 0/288 dead transitions. [2024-06-04 15:34:39,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 288 transitions, 4406 flow [2024-06-04 15:34:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:34:39,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-04 15:34:39,664 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 3655 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:34:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 288 transitions, 4406 flow [2024-06-04 15:34:40,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 288 transitions, 4232 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:40,229 INFO L231 Difference]: Finished difference. Result has 211 places, 270 transitions, 3679 flow [2024-06-04 15:34:40,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3679, PETRI_PLACES=211, PETRI_TRANSITIONS=270} [2024-06-04 15:34:40,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 15:34:40,230 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 270 transitions, 3679 flow [2024-06-04 15:34:40,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:40,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:40,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:40,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:34:40,231 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:40,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash 493826826, now seen corresponding path program 4 times [2024-06-04 15:34:40,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598689790] [2024-06-04 15:34:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:40,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598689790] [2024-06-04 15:34:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598689790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:41,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:41,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915883145] [2024-06-04 15:34:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:41,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:41,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:41,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:41,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:41,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 270 transitions, 3679 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:41,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:41,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:41,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:42,431 INFO L124 PetriNetUnfolderBase]: 3124/4789 cut-off events. [2024-06-04 15:34:42,431 INFO L125 PetriNetUnfolderBase]: For 280035/280037 co-relation queries the response was YES. [2024-06-04 15:34:42,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36866 conditions, 4789 events. 3124/4789 cut-off events. For 280035/280037 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25749 event pairs, 735 based on Foata normal form. 12/4800 useless extension candidates. Maximal degree in co-relation 36762. Up to 4614 conditions per place. [2024-06-04 15:34:42,484 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 278 selfloop transitions, 18 changer transitions 0/299 dead transitions. [2024-06-04 15:34:42,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 299 transitions, 4351 flow [2024-06-04 15:34:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:42,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:42,486 INFO L175 Difference]: Start difference. First operand has 211 places, 270 transitions, 3679 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:42,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 299 transitions, 4351 flow [2024-06-04 15:34:43,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 299 transitions, 4239 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:43,078 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3609 flow [2024-06-04 15:34:43,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-06-04 15:34:43,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-04 15:34:43,078 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3609 flow [2024-06-04 15:34:43,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:43,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:43,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:43,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:34:43,079 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:43,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:43,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1888654168, now seen corresponding path program 5 times [2024-06-04 15:34:43,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:43,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662535504] [2024-06-04 15:34:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:43,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662535504] [2024-06-04 15:34:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662535504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:44,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:34:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290423600] [2024-06-04 15:34:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:34:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:34:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:34:44,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:44,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3609 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:44,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:44,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:44,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:45,523 INFO L124 PetriNetUnfolderBase]: 3104/4756 cut-off events. [2024-06-04 15:34:45,524 INFO L125 PetriNetUnfolderBase]: For 274503/274507 co-relation queries the response was YES. [2024-06-04 15:34:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36148 conditions, 4756 events. 3104/4756 cut-off events. For 274503/274507 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25554 event pairs, 728 based on Foata normal form. 16/4771 useless extension candidates. Maximal degree in co-relation 36043. Up to 4459 conditions per place. [2024-06-04 15:34:45,578 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 35 changer transitions 0/302 dead transitions. [2024-06-04 15:34:45,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 302 transitions, 4207 flow [2024-06-04 15:34:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:34:45,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-04 15:34:45,579 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3609 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:34:45,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 302 transitions, 4207 flow [2024-06-04 15:34:46,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 302 transitions, 4075 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:34:46,063 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3460 flow [2024-06-04 15:34:46,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3460, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-06-04 15:34:46,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-04 15:34:46,064 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3460 flow [2024-06-04 15:34:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:46,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:46,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:46,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:34:46,064 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)] === [2024-06-04 15:34:46,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 898480152, now seen corresponding path program 2 times [2024-06-04 15:34:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:46,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621993038] [2024-06-04 15:34:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621993038] [2024-06-04 15:34:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621993038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:46,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:46,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374311842] [2024-06-04 15:34:46,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:46,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:46,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:46,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:46,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3460 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:46,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:46,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:46,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:47,854 INFO L124 PetriNetUnfolderBase]: 3094/4741 cut-off events. [2024-06-04 15:34:47,854 INFO L125 PetriNetUnfolderBase]: For 251189/251189 co-relation queries the response was YES. [2024-06-04 15:34:47,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35226 conditions, 4741 events. 3094/4741 cut-off events. For 251189/251189 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25457 event pairs, 746 based on Foata normal form. 4/4744 useless extension candidates. Maximal degree in co-relation 35122. Up to 4642 conditions per place. [2024-06-04 15:34:47,902 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 246 selfloop transitions, 41 changer transitions 0/290 dead transitions. [2024-06-04 15:34:47,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4175 flow [2024-06-04 15:34:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 15:34:47,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-04 15:34:47,906 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3460 flow. Second operand 6 states and 103 transitions. [2024-06-04 15:34:47,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4175 flow [2024-06-04 15:34:48,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 290 transitions, 3943 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-04 15:34:48,624 INFO L231 Difference]: Finished difference. Result has 210 places, 272 transitions, 3418 flow [2024-06-04 15:34:48,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3418, PETRI_PLACES=210, PETRI_TRANSITIONS=272} [2024-06-04 15:34:48,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 15:34:48,625 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 272 transitions, 3418 flow [2024-06-04 15:34:48,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:48,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:48,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:48,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:34:48,625 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:48,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash 29130566, now seen corresponding path program 2 times [2024-06-04 15:34:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:48,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798123116] [2024-06-04 15:34:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:48,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798123116] [2024-06-04 15:34:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798123116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:49,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545715906] [2024-06-04 15:34:49,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:49,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:49,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 272 transitions, 3418 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:50,919 INFO L124 PetriNetUnfolderBase]: 3374/5132 cut-off events. [2024-06-04 15:34:50,919 INFO L125 PetriNetUnfolderBase]: For 296955/296959 co-relation queries the response was YES. [2024-06-04 15:34:50,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 5132 events. 3374/5132 cut-off events. For 296955/296959 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27640 event pairs, 682 based on Foata normal form. 16/5147 useless extension candidates. Maximal degree in co-relation 38574. Up to 4353 conditions per place. [2024-06-04 15:34:50,972 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 222 selfloop transitions, 121 changer transitions 0/346 dead transitions. [2024-06-04 15:34:50,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 346 transitions, 5034 flow [2024-06-04 15:34:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 15:34:50,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 15:34:50,973 INFO L175 Difference]: Start difference. First operand has 210 places, 272 transitions, 3418 flow. Second operand 8 states and 160 transitions. [2024-06-04 15:34:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 346 transitions, 5034 flow [2024-06-04 15:34:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 4892 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:51,718 INFO L231 Difference]: Finished difference. Result has 215 places, 299 transitions, 4194 flow [2024-06-04 15:34:51,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4194, PETRI_PLACES=215, PETRI_TRANSITIONS=299} [2024-06-04 15:34:51,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 15:34:51,719 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 299 transitions, 4194 flow [2024-06-04 15:34:51,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:51,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:51,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:51,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:34:51,719 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:51,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 134654113, now seen corresponding path program 1 times [2024-06-04 15:34:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608648030] [2024-06-04 15:34:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:51,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:52,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:52,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608648030] [2024-06-04 15:34:52,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608648030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:52,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318953985] [2024-06-04 15:34:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:52,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:52,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:52,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:52,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 299 transitions, 4194 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:52,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:52,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:52,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:53,972 INFO L124 PetriNetUnfolderBase]: 3394/5159 cut-off events. [2024-06-04 15:34:53,972 INFO L125 PetriNetUnfolderBase]: For 287822/287822 co-relation queries the response was YES. [2024-06-04 15:34:54,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40547 conditions, 5159 events. 3394/5159 cut-off events. For 287822/287822 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27785 event pairs, 789 based on Foata normal form. 4/5162 useless extension candidates. Maximal degree in co-relation 40442. Up to 4992 conditions per place. [2024-06-04 15:34:54,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 50 changer transitions 0/329 dead transitions. [2024-06-04 15:34:54,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 329 transitions, 5129 flow [2024-06-04 15:34:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 15:34:54,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-04 15:34:54,024 INFO L175 Difference]: Start difference. First operand has 215 places, 299 transitions, 4194 flow. Second operand 8 states and 130 transitions. [2024-06-04 15:34:54,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 329 transitions, 5129 flow [2024-06-04 15:34:54,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 4980 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:54,797 INFO L231 Difference]: Finished difference. Result has 219 places, 305 transitions, 4267 flow [2024-06-04 15:34:54,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4267, PETRI_PLACES=219, PETRI_TRANSITIONS=305} [2024-06-04 15:34:54,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 15:34:54,798 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 305 transitions, 4267 flow [2024-06-04 15:34:54,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:54,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:54,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:54,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:34:54,798 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:54,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1560463935, now seen corresponding path program 2 times [2024-06-04 15:34:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:54,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363272226] [2024-06-04 15:34:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363272226] [2024-06-04 15:34:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363272226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:55,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:55,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573020402] [2024-06-04 15:34:55,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:55,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:55,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:55,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 305 transitions, 4267 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:55,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:55,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:55,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:56,978 INFO L124 PetriNetUnfolderBase]: 3414/5187 cut-off events. [2024-06-04 15:34:56,978 INFO L125 PetriNetUnfolderBase]: For 285869/285869 co-relation queries the response was YES. [2024-06-04 15:34:57,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40717 conditions, 5187 events. 3414/5187 cut-off events. For 285869/285869 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27885 event pairs, 810 based on Foata normal form. 4/5190 useless extension candidates. Maximal degree in co-relation 40611. Up to 5096 conditions per place. [2024-06-04 15:34:57,029 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 36 changer transitions 0/329 dead transitions. [2024-06-04 15:34:57,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 329 transitions, 5044 flow [2024-06-04 15:34:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:34:57,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:34:57,030 INFO L175 Difference]: Start difference. First operand has 219 places, 305 transitions, 4267 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:34:57,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 329 transitions, 5044 flow [2024-06-04 15:34:57,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 329 transitions, 4943 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:57,804 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 4310 flow [2024-06-04 15:34:57,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=223, PETRI_TRANSITIONS=308} [2024-06-04 15:34:57,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 15:34:57,805 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 4310 flow [2024-06-04 15:34:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:57,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:34:57,805 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)] === [2024-06-04 15:34:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 34856545, now seen corresponding path program 3 times [2024-06-04 15:34:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:57,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536835686] [2024-06-04 15:34:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:58,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:58,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536835686] [2024-06-04 15:34:58,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536835686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:58,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:58,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755742760] [2024-06-04 15:34:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:58,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:58,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:58,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:58,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 308 transitions, 4310 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:34:58,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:58,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:58,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:00,131 INFO L124 PetriNetUnfolderBase]: 3402/5171 cut-off events. [2024-06-04 15:35:00,131 INFO L125 PetriNetUnfolderBase]: For 290807/290807 co-relation queries the response was YES. [2024-06-04 15:35:00,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40482 conditions, 5171 events. 3402/5171 cut-off events. For 290807/290807 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27851 event pairs, 785 based on Foata normal form. 4/5174 useless extension candidates. Maximal degree in co-relation 40374. Up to 5024 conditions per place. [2024-06-04 15:35:00,272 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 49 changer transitions 0/329 dead transitions. [2024-06-04 15:35:00,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 329 transitions, 5023 flow [2024-06-04 15:35:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:35:00,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:35:00,274 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 4310 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:35:00,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 329 transitions, 5023 flow [2024-06-04 15:35:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 329 transitions, 4895 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:00,954 INFO L231 Difference]: Finished difference. Result has 224 places, 308 transitions, 4290 flow [2024-06-04 15:35:00,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4290, PETRI_PLACES=224, PETRI_TRANSITIONS=308} [2024-06-04 15:35:00,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 15:35:00,955 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 308 transitions, 4290 flow [2024-06-04 15:35:00,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:00,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:00,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:35:00,955 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)] === [2024-06-04 15:35:00,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2062886996, now seen corresponding path program 1 times [2024-06-04 15:35:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268307820] [2024-06-04 15:35:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:02,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268307820] [2024-06-04 15:35:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268307820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:02,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:02,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145929579] [2024-06-04 15:35:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:02,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:02,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 308 transitions, 4290 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:02,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:02,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:03,545 INFO L124 PetriNetUnfolderBase]: 3558/5405 cut-off events. [2024-06-04 15:35:03,545 INFO L125 PetriNetUnfolderBase]: For 338242/338244 co-relation queries the response was YES. [2024-06-04 15:35:03,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43007 conditions, 5405 events. 3558/5405 cut-off events. For 338242/338244 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29278 event pairs, 589 based on Foata normal form. 14/5418 useless extension candidates. Maximal degree in co-relation 42898. Up to 4419 conditions per place. [2024-06-04 15:35:03,596 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 302 selfloop transitions, 109 changer transitions 0/414 dead transitions. [2024-06-04 15:35:03,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 414 transitions, 6685 flow [2024-06-04 15:35:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:35:03,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-04 15:35:03,597 INFO L175 Difference]: Start difference. First operand has 224 places, 308 transitions, 4290 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:35:03,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 414 transitions, 6685 flow [2024-06-04 15:35:04,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 414 transitions, 6537 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:04,334 INFO L231 Difference]: Finished difference. Result has 231 places, 353 transitions, 5383 flow [2024-06-04 15:35:04,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5383, PETRI_PLACES=231, PETRI_TRANSITIONS=353} [2024-06-04 15:35:04,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-04 15:35:04,335 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 353 transitions, 5383 flow [2024-06-04 15:35:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:04,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:04,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:04,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:35:04,335 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)] === [2024-06-04 15:35:04,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2050242500, now seen corresponding path program 1 times [2024-06-04 15:35:04,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:04,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086167669] [2024-06-04 15:35:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:04,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086167669] [2024-06-04 15:35:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086167669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:06,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:06,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134536288] [2024-06-04 15:35:06,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:06,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:06,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 353 transitions, 5383 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:06,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:06,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:06,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:07,557 INFO L124 PetriNetUnfolderBase]: 3610/5476 cut-off events. [2024-06-04 15:35:07,557 INFO L125 PetriNetUnfolderBase]: For 343710/343714 co-relation queries the response was YES. [2024-06-04 15:35:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 5476 events. 3610/5476 cut-off events. For 343710/343714 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29710 event pairs, 818 based on Foata normal form. 8/5483 useless extension candidates. Maximal degree in co-relation 46006. Up to 5184 conditions per place. [2024-06-04 15:35:07,614 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 333 selfloop transitions, 67 changer transitions 0/403 dead transitions. [2024-06-04 15:35:07,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 403 transitions, 6653 flow [2024-06-04 15:35:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:35:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:35:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 15:35:07,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-04 15:35:07,616 INFO L175 Difference]: Start difference. First operand has 231 places, 353 transitions, 5383 flow. Second operand 11 states and 182 transitions. [2024-06-04 15:35:07,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 403 transitions, 6653 flow [2024-06-04 15:35:08,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 403 transitions, 6563 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:08,717 INFO L231 Difference]: Finished difference. Result has 241 places, 363 transitions, 5669 flow [2024-06-04 15:35:08,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5669, PETRI_PLACES=241, PETRI_TRANSITIONS=363} [2024-06-04 15:35:08,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-04 15:35:08,718 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 363 transitions, 5669 flow [2024-06-04 15:35:08,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:08,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:08,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:08,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:35:08,719 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)] === [2024-06-04 15:35:08,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2050242190, now seen corresponding path program 2 times [2024-06-04 15:35:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674676796] [2024-06-04 15:35:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:10,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:10,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674676796] [2024-06-04 15:35:10,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674676796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:10,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:10,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:10,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060067112] [2024-06-04 15:35:10,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:10,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:10,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:10,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:10,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 363 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:10,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:10,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:10,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:11,435 INFO L124 PetriNetUnfolderBase]: 3642/5524 cut-off events. [2024-06-04 15:35:11,435 INFO L125 PetriNetUnfolderBase]: For 359356/359360 co-relation queries the response was YES. [2024-06-04 15:35:11,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47316 conditions, 5524 events. 3642/5524 cut-off events. For 359356/359360 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30020 event pairs, 816 based on Foata normal form. 8/5531 useless extension candidates. Maximal degree in co-relation 47199. Up to 5238 conditions per place. [2024-06-04 15:35:11,494 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 340 selfloop transitions, 65 changer transitions 0/408 dead transitions. [2024-06-04 15:35:11,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 408 transitions, 6746 flow [2024-06-04 15:35:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:35:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:35:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 15:35:11,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-04 15:35:11,495 INFO L175 Difference]: Start difference. First operand has 241 places, 363 transitions, 5669 flow. Second operand 10 states and 171 transitions. [2024-06-04 15:35:11,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 408 transitions, 6746 flow [2024-06-04 15:35:12,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 408 transitions, 6579 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:12,411 INFO L231 Difference]: Finished difference. Result has 246 places, 369 transitions, 5783 flow [2024-06-04 15:35:12,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5783, PETRI_PLACES=246, PETRI_TRANSITIONS=369} [2024-06-04 15:35:12,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 15:35:12,412 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 369 transitions, 5783 flow [2024-06-04 15:35:12,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:12,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:12,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:35:12,413 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)] === [2024-06-04 15:35:12,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2054315806, now seen corresponding path program 2 times [2024-06-04 15:35:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791418696] [2024-06-04 15:35:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:14,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791418696] [2024-06-04 15:35:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791418696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:14,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198688489] [2024-06-04 15:35:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:14,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:14,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 369 transitions, 5783 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:15,757 INFO L124 PetriNetUnfolderBase]: 3692/5594 cut-off events. [2024-06-04 15:35:15,757 INFO L125 PetriNetUnfolderBase]: For 371409/371413 co-relation queries the response was YES. [2024-06-04 15:35:15,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48197 conditions, 5594 events. 3692/5594 cut-off events. For 371409/371413 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30439 event pairs, 807 based on Foata normal form. 8/5601 useless extension candidates. Maximal degree in co-relation 48078. Up to 5193 conditions per place. [2024-06-04 15:35:15,812 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 316 selfloop transitions, 99 changer transitions 0/418 dead transitions. [2024-06-04 15:35:15,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 418 transitions, 7034 flow [2024-06-04 15:35:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:35:15,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:35:15,813 INFO L175 Difference]: Start difference. First operand has 246 places, 369 transitions, 5783 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:35:15,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 418 transitions, 7034 flow [2024-06-04 15:35:16,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 418 transitions, 6829 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-04 15:35:16,672 INFO L231 Difference]: Finished difference. Result has 250 places, 384 transitions, 6135 flow [2024-06-04 15:35:16,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6135, PETRI_PLACES=250, PETRI_TRANSITIONS=384} [2024-06-04 15:35:16,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 15:35:16,673 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 384 transitions, 6135 flow [2024-06-04 15:35:16,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:16,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:16,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:16,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:35:16,673 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)] === [2024-06-04 15:35:16,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2126634264, now seen corresponding path program 1 times [2024-06-04 15:35:16,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:16,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814387476] [2024-06-04 15:35:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814387476] [2024-06-04 15:35:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814387476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004253035] [2024-06-04 15:35:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:17,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:17,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 384 transitions, 6135 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:17,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:17,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:17,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:18,907 INFO L124 PetriNetUnfolderBase]: 3786/5725 cut-off events. [2024-06-04 15:35:18,907 INFO L125 PetriNetUnfolderBase]: For 401156/401158 co-relation queries the response was YES. [2024-06-04 15:35:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50231 conditions, 5725 events. 3786/5725 cut-off events. For 401156/401158 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31197 event pairs, 744 based on Foata normal form. 6/5730 useless extension candidates. Maximal degree in co-relation 50109. Up to 4892 conditions per place. [2024-06-04 15:35:18,972 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 329 selfloop transitions, 123 changer transitions 0/455 dead transitions. [2024-06-04 15:35:18,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 455 transitions, 8232 flow [2024-06-04 15:35:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:35:18,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-04 15:35:18,973 INFO L175 Difference]: Start difference. First operand has 250 places, 384 transitions, 6135 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:35:18,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 455 transitions, 8232 flow [2024-06-04 15:35:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 455 transitions, 8065 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:20,280 INFO L231 Difference]: Finished difference. Result has 257 places, 419 transitions, 7058 flow [2024-06-04 15:35:20,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7058, PETRI_PLACES=257, PETRI_TRANSITIONS=419} [2024-06-04 15:35:20,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-04 15:35:20,280 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 419 transitions, 7058 flow [2024-06-04 15:35:20,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:20,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:20,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:20,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:35:20,281 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:20,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1944437174, now seen corresponding path program 2 times [2024-06-04 15:35:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:20,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270499129] [2024-06-04 15:35:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270499129] [2024-06-04 15:35:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270499129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122697494] [2024-06-04 15:35:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:21,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:21,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 419 transitions, 7058 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:21,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:21,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:21,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:22,751 INFO L124 PetriNetUnfolderBase]: 3969/5979 cut-off events. [2024-06-04 15:35:22,751 INFO L125 PetriNetUnfolderBase]: For 454759/454763 co-relation queries the response was YES. [2024-06-04 15:35:22,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54380 conditions, 5979 events. 3969/5979 cut-off events. For 454759/454763 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32609 event pairs, 822 based on Foata normal form. 22/6000 useless extension candidates. Maximal degree in co-relation 54254. Up to 5645 conditions per place. [2024-06-04 15:35:22,827 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 72 changer transitions 0/482 dead transitions. [2024-06-04 15:35:22,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 482 transitions, 8962 flow [2024-06-04 15:35:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:35:22,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:35:22,828 INFO L175 Difference]: Start difference. First operand has 257 places, 419 transitions, 7058 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:35:22,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 482 transitions, 8962 flow [2024-06-04 15:35:24,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 482 transitions, 8714 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:24,053 INFO L231 Difference]: Finished difference. Result has 265 places, 450 transitions, 7708 flow [2024-06-04 15:35:24,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7708, PETRI_PLACES=265, PETRI_TRANSITIONS=450} [2024-06-04 15:35:24,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 15:35:24,053 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 450 transitions, 7708 flow [2024-06-04 15:35:24,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:24,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:24,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:24,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:35:24,054 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:24,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1949382774, now seen corresponding path program 3 times [2024-06-04 15:35:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753718004] [2024-06-04 15:35:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753718004] [2024-06-04 15:35:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753718004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357861583] [2024-06-04 15:35:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:25,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:25,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 450 transitions, 7708 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:25,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:25,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:25,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:26,751 INFO L124 PetriNetUnfolderBase]: 4235/6347 cut-off events. [2024-06-04 15:35:26,751 INFO L125 PetriNetUnfolderBase]: For 521989/521993 co-relation queries the response was YES. [2024-06-04 15:35:26,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60127 conditions, 6347 events. 4235/6347 cut-off events. For 521989/521993 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34719 event pairs, 836 based on Foata normal form. 22/6368 useless extension candidates. Maximal degree in co-relation 59998. Up to 5483 conditions per place. [2024-06-04 15:35:26,844 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 365 selfloop transitions, 149 changer transitions 0/517 dead transitions. [2024-06-04 15:35:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 517 transitions, 9961 flow [2024-06-04 15:35:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:35:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:35:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 15:35:26,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-04 15:35:26,846 INFO L175 Difference]: Start difference. First operand has 265 places, 450 transitions, 7708 flow. Second operand 10 states and 171 transitions. [2024-06-04 15:35:26,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 517 transitions, 9961 flow [2024-06-04 15:35:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 517 transitions, 9606 flow, removed 146 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:28,346 INFO L231 Difference]: Finished difference. Result has 273 places, 477 transitions, 8419 flow [2024-06-04 15:35:28,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7353, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8419, PETRI_PLACES=273, PETRI_TRANSITIONS=477} [2024-06-04 15:35:28,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-04 15:35:28,347 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 477 transitions, 8419 flow [2024-06-04 15:35:28,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:28,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:28,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:35:28,348 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1949136510, now seen corresponding path program 1 times [2024-06-04 15:35:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358803402] [2024-06-04 15:35:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:30,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358803402] [2024-06-04 15:35:30,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358803402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:30,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:30,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:30,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127924316] [2024-06-04 15:35:30,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:30,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:30,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:30,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 477 transitions, 8419 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:31,775 INFO L124 PetriNetUnfolderBase]: 4243/6358 cut-off events. [2024-06-04 15:35:31,775 INFO L125 PetriNetUnfolderBase]: For 515736/515736 co-relation queries the response was YES. [2024-06-04 15:35:31,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61274 conditions, 6358 events. 4243/6358 cut-off events. For 515736/515736 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34836 event pairs, 922 based on Foata normal form. 2/6359 useless extension candidates. Maximal degree in co-relation 61141. Up to 6315 conditions per place. [2024-06-04 15:35:31,867 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 16 changer transitions 0/499 dead transitions. [2024-06-04 15:35:31,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 499 transitions, 9543 flow [2024-06-04 15:35:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-04 15:35:31,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-04 15:35:31,868 INFO L175 Difference]: Start difference. First operand has 273 places, 477 transitions, 8419 flow. Second operand 8 states and 117 transitions. [2024-06-04 15:35:31,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 499 transitions, 9543 flow [2024-06-04 15:35:33,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 499 transitions, 9068 flow, removed 201 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:33,540 INFO L231 Difference]: Finished difference. Result has 278 places, 480 transitions, 8075 flow [2024-06-04 15:35:33,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7944, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8075, PETRI_PLACES=278, PETRI_TRANSITIONS=480} [2024-06-04 15:35:33,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-04 15:35:33,541 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 480 transitions, 8075 flow [2024-06-04 15:35:33,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:33,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:33,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:33,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:35:33,541 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)] === [2024-06-04 15:35:33,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1949505596, now seen corresponding path program 3 times [2024-06-04 15:35:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:33,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455001511] [2024-06-04 15:35:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455001511] [2024-06-04 15:35:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455001511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729403793] [2024-06-04 15:35:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:35,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 480 transitions, 8075 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:35,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:35,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:36,962 INFO L124 PetriNetUnfolderBase]: 4251/6371 cut-off events. [2024-06-04 15:35:36,962 INFO L125 PetriNetUnfolderBase]: For 515587/515591 co-relation queries the response was YES. [2024-06-04 15:35:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 6371 events. 4251/6371 cut-off events. For 515587/515591 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34962 event pairs, 848 based on Foata normal form. 8/6378 useless extension candidates. Maximal degree in co-relation 59547. Up to 6099 conditions per place. [2024-06-04 15:35:37,032 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 442 selfloop transitions, 65 changer transitions 0/510 dead transitions. [2024-06-04 15:35:37,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 510 transitions, 9288 flow [2024-06-04 15:35:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:35:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:35:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-04 15:35:37,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:35:37,033 INFO L175 Difference]: Start difference. First operand has 278 places, 480 transitions, 8075 flow. Second operand 10 states and 155 transitions. [2024-06-04 15:35:37,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 510 transitions, 9288 flow [2024-06-04 15:35:38,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 510 transitions, 9020 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:38,588 INFO L231 Difference]: Finished difference. Result has 281 places, 485 transitions, 8068 flow [2024-06-04 15:35:38,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8068, PETRI_PLACES=281, PETRI_TRANSITIONS=485} [2024-06-04 15:35:38,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-04 15:35:38,589 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 485 transitions, 8068 flow [2024-06-04 15:35:38,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:38,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:35:38,589 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)] === [2024-06-04 15:35:38,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash 918137524, now seen corresponding path program 4 times [2024-06-04 15:35:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:38,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831049550] [2024-06-04 15:35:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831049550] [2024-06-04 15:35:39,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831049550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:39,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:39,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799708430] [2024-06-04 15:35:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:39,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 485 transitions, 8068 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:41,356 INFO L124 PetriNetUnfolderBase]: 4277/6406 cut-off events. [2024-06-04 15:35:41,357 INFO L125 PetriNetUnfolderBase]: For 531730/531730 co-relation queries the response was YES. [2024-06-04 15:35:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60113 conditions, 6406 events. 4277/6406 cut-off events. For 531730/531730 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35144 event pairs, 912 based on Foata normal form. 2/6407 useless extension candidates. Maximal degree in co-relation 59978. Up to 6300 conditions per place. [2024-06-04 15:35:41,433 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 42 changer transitions 0/520 dead transitions. [2024-06-04 15:35:41,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 520 transitions, 9510 flow [2024-06-04 15:35:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:35:41,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:35:41,435 INFO L175 Difference]: Start difference. First operand has 281 places, 485 transitions, 8068 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:35:41,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 520 transitions, 9510 flow [2024-06-04 15:35:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 520 transitions, 9226 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:42,826 INFO L231 Difference]: Finished difference. Result has 283 places, 496 transitions, 8126 flow [2024-06-04 15:35:42,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8126, PETRI_PLACES=283, PETRI_TRANSITIONS=496} [2024-06-04 15:35:42,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 15:35:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 496 transitions, 8126 flow [2024-06-04 15:35:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:42,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:42,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:35:42,827 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)] === [2024-06-04 15:35:42,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1014438022, now seen corresponding path program 5 times [2024-06-04 15:35:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:42,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251274878] [2024-06-04 15:35:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:43,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:43,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251274878] [2024-06-04 15:35:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251274878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:43,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251708517] [2024-06-04 15:35:43,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:43,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:43,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:43,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 496 transitions, 8126 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:43,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:43,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:43,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:45,244 INFO L124 PetriNetUnfolderBase]: 4287/6420 cut-off events. [2024-06-04 15:35:45,244 INFO L125 PetriNetUnfolderBase]: For 544521/544521 co-relation queries the response was YES. [2024-06-04 15:35:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60414 conditions, 6420 events. 4287/6420 cut-off events. For 544521/544521 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35254 event pairs, 930 based on Foata normal form. 2/6421 useless extension candidates. Maximal degree in co-relation 60279. Up to 6345 conditions per place. [2024-06-04 15:35:45,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 39 changer transitions 0/520 dead transitions. [2024-06-04 15:35:45,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 520 transitions, 9321 flow [2024-06-04 15:35:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 15:35:45,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-04 15:35:45,329 INFO L175 Difference]: Start difference. First operand has 283 places, 496 transitions, 8126 flow. Second operand 8 states and 121 transitions. [2024-06-04 15:35:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 520 transitions, 9321 flow [2024-06-04 15:35:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 520 transitions, 9208 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:46,616 INFO L231 Difference]: Finished difference. Result has 289 places, 502 transitions, 8224 flow [2024-06-04 15:35:46,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8224, PETRI_PLACES=289, PETRI_TRANSITIONS=502} [2024-06-04 15:35:46,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-04 15:35:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 502 transitions, 8224 flow [2024-06-04 15:35:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:46,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:35:46,617 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)] === [2024-06-04 15:35:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 775109032, now seen corresponding path program 6 times [2024-06-04 15:35:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596103453] [2024-06-04 15:35:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:46,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596103453] [2024-06-04 15:35:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596103453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154706133] [2024-06-04 15:35:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:47,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:47,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 502 transitions, 8224 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:47,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:47,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:47,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:49,276 INFO L124 PetriNetUnfolderBase]: 4297/6434 cut-off events. [2024-06-04 15:35:49,276 INFO L125 PetriNetUnfolderBase]: For 560518/560518 co-relation queries the response was YES. [2024-06-04 15:35:49,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60766 conditions, 6434 events. 4297/6434 cut-off events. For 560518/560518 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35325 event pairs, 917 based on Foata normal form. 2/6435 useless extension candidates. Maximal degree in co-relation 60629. Up to 6237 conditions per place. [2024-06-04 15:35:49,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 68 changer transitions 0/538 dead transitions. [2024-06-04 15:35:49,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 538 transitions, 9930 flow [2024-06-04 15:35:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:35:49,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:35:49,364 INFO L175 Difference]: Start difference. First operand has 289 places, 502 transitions, 8224 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:35:49,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 538 transitions, 9930 flow [2024-06-04 15:35:50,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 538 transitions, 9794 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:50,773 INFO L231 Difference]: Finished difference. Result has 293 places, 513 transitions, 8580 flow [2024-06-04 15:35:50,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8088, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8580, PETRI_PLACES=293, PETRI_TRANSITIONS=513} [2024-06-04 15:35:50,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-04 15:35:50,774 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 513 transitions, 8580 flow [2024-06-04 15:35:50,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:50,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:50,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:35:50,775 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)] === [2024-06-04 15:35:50,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash 775229002, now seen corresponding path program 7 times [2024-06-04 15:35:50,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:50,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647567041] [2024-06-04 15:35:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:50,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647567041] [2024-06-04 15:35:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647567041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:51,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:51,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607699460] [2024-06-04 15:35:51,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:51,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:51,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:51,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 513 transitions, 8580 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:51,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:51,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:51,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:53,324 INFO L124 PetriNetUnfolderBase]: 4279/6410 cut-off events. [2024-06-04 15:35:53,324 INFO L125 PetriNetUnfolderBase]: For 570836/570836 co-relation queries the response was YES. [2024-06-04 15:35:53,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60510 conditions, 6410 events. 4279/6410 cut-off events. For 570836/570836 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35175 event pairs, 915 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 60371. Up to 6348 conditions per place. [2024-06-04 15:35:53,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 22 changer transitions 0/537 dead transitions. [2024-06-04 15:35:53,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 537 transitions, 9825 flow [2024-06-04 15:35:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 15:35:53,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-04 15:35:53,409 INFO L175 Difference]: Start difference. First operand has 293 places, 513 transitions, 8580 flow. Second operand 8 states and 121 transitions. [2024-06-04 15:35:53,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 537 transitions, 9825 flow [2024-06-04 15:35:54,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 537 transitions, 9652 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:54,790 INFO L231 Difference]: Finished difference. Result has 296 places, 516 transitions, 8559 flow [2024-06-04 15:35:54,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8559, PETRI_PLACES=296, PETRI_TRANSITIONS=516} [2024-06-04 15:35:54,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 15:35:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 516 transitions, 8559 flow [2024-06-04 15:35:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:54,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:35:54,791 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:54,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 483144148, now seen corresponding path program 8 times [2024-06-04 15:35:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207631171] [2024-06-04 15:35:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207631171] [2024-06-04 15:35:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207631171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:55,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:55,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243134282] [2024-06-04 15:35:55,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:55,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:55,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 516 transitions, 8559 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:55,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:55,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:55,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:57,321 INFO L124 PetriNetUnfolderBase]: 4314/6459 cut-off events. [2024-06-04 15:35:57,321 INFO L125 PetriNetUnfolderBase]: For 589068/589068 co-relation queries the response was YES. [2024-06-04 15:35:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61057 conditions, 6459 events. 4314/6459 cut-off events. For 589068/589068 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35509 event pairs, 924 based on Foata normal form. 6/6464 useless extension candidates. Maximal degree in co-relation 60918. Up to 6359 conditions per place. [2024-06-04 15:35:57,411 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 500 selfloop transitions, 46 changer transitions 0/549 dead transitions. [2024-06-04 15:35:57,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 549 transitions, 9921 flow [2024-06-04 15:35:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 15:35:57,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-04 15:35:57,412 INFO L175 Difference]: Start difference. First operand has 296 places, 516 transitions, 8559 flow. Second operand 9 states and 140 transitions. [2024-06-04 15:35:57,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 549 transitions, 9921 flow [2024-06-04 15:35:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 549 transitions, 9689 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:59,026 INFO L231 Difference]: Finished difference. Result has 298 places, 527 transitions, 8650 flow [2024-06-04 15:35:59,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8650, PETRI_PLACES=298, PETRI_TRANSITIONS=527} [2024-06-04 15:35:59,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-04 15:35:59,026 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 527 transitions, 8650 flow [2024-06-04 15:35:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:59,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:59,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:59,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:35:59,027 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:59,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1129492042, now seen corresponding path program 9 times [2024-06-04 15:35:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510304506] [2024-06-04 15:35:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:59,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510304506] [2024-06-04 15:35:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510304506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:59,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596217883] [2024-06-04 15:35:59,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:59,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:59,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:59,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:59,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 527 transitions, 8650 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:35:59,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:59,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:59,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:01,531 INFO L124 PetriNetUnfolderBase]: 4376/6545 cut-off events. [2024-06-04 15:36:01,531 INFO L125 PetriNetUnfolderBase]: For 615130/615130 co-relation queries the response was YES. [2024-06-04 15:36:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62983 conditions, 6545 events. 4376/6545 cut-off events. For 615130/615130 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36048 event pairs, 916 based on Foata normal form. 6/6550 useless extension candidates. Maximal degree in co-relation 62842. Up to 6387 conditions per place. [2024-06-04 15:36:01,620 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 63 changer transitions 0/565 dead transitions. [2024-06-04 15:36:01,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 565 transitions, 10354 flow [2024-06-04 15:36:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:36:01,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-04 15:36:01,621 INFO L175 Difference]: Start difference. First operand has 298 places, 527 transitions, 8650 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:36:01,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 565 transitions, 10354 flow [2024-06-04 15:36:03,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 565 transitions, 10180 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:03,394 INFO L231 Difference]: Finished difference. Result has 302 places, 540 transitions, 9003 flow [2024-06-04 15:36:03,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9003, PETRI_PLACES=302, PETRI_TRANSITIONS=540} [2024-06-04 15:36:03,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 15:36:03,395 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 540 transitions, 9003 flow [2024-06-04 15:36:03,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:03,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:03,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:03,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:36:03,395 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:03,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:03,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1500482904, now seen corresponding path program 10 times [2024-06-04 15:36:03,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:03,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896941883] [2024-06-04 15:36:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:04,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896941883] [2024-06-04 15:36:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896941883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:04,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779944207] [2024-06-04 15:36:04,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:04,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:04,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:04,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 540 transitions, 9003 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:04,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:04,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:06,010 INFO L124 PetriNetUnfolderBase]: 4422/6609 cut-off events. [2024-06-04 15:36:06,010 INFO L125 PetriNetUnfolderBase]: For 638362/638362 co-relation queries the response was YES. [2024-06-04 15:36:06,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64034 conditions, 6609 events. 4422/6609 cut-off events. For 638362/638362 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36408 event pairs, 915 based on Foata normal form. 6/6614 useless extension candidates. Maximal degree in co-relation 63891. Up to 6280 conditions per place. [2024-06-04 15:36:06,112 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 465 selfloop transitions, 110 changer transitions 0/578 dead transitions. [2024-06-04 15:36:06,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 578 transitions, 10591 flow [2024-06-04 15:36:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:36:06,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:36:06,114 INFO L175 Difference]: Start difference. First operand has 302 places, 540 transitions, 9003 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:36:06,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 578 transitions, 10591 flow [2024-06-04 15:36:07,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 578 transitions, 10412 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:07,995 INFO L231 Difference]: Finished difference. Result has 307 places, 547 transitions, 9330 flow [2024-06-04 15:36:07,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8824, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9330, PETRI_PLACES=307, PETRI_TRANSITIONS=547} [2024-06-04 15:36:07,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-04 15:36:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 547 transitions, 9330 flow [2024-06-04 15:36:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:07,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:07,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:36:07,996 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:07,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1080540358, now seen corresponding path program 11 times [2024-06-04 15:36:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790302606] [2024-06-04 15:36:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790302606] [2024-06-04 15:36:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790302606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:08,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784650796] [2024-06-04 15:36:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:08,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 547 transitions, 9330 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:10,569 INFO L124 PetriNetUnfolderBase]: 4433/6625 cut-off events. [2024-06-04 15:36:10,569 INFO L125 PetriNetUnfolderBase]: For 648476/648476 co-relation queries the response was YES. [2024-06-04 15:36:10,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64578 conditions, 6625 events. 4433/6625 cut-off events. For 648476/648476 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36566 event pairs, 923 based on Foata normal form. 6/6630 useless extension candidates. Maximal degree in co-relation 64432. Up to 6442 conditions per place. [2024-06-04 15:36:10,645 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 506 selfloop transitions, 73 changer transitions 0/582 dead transitions. [2024-06-04 15:36:10,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 582 transitions, 10711 flow [2024-06-04 15:36:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:36:10,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:36:10,646 INFO L175 Difference]: Start difference. First operand has 307 places, 547 transitions, 9330 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:36:10,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 582 transitions, 10711 flow [2024-06-04 15:36:12,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 582 transitions, 10549 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:12,562 INFO L231 Difference]: Finished difference. Result has 311 places, 554 transitions, 9501 flow [2024-06-04 15:36:12,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9501, PETRI_PLACES=311, PETRI_TRANSITIONS=554} [2024-06-04 15:36:12,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 15:36:12,563 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 554 transitions, 9501 flow [2024-06-04 15:36:12,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:12,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:12,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:36:12,563 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)] === [2024-06-04 15:36:12,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 903171688, now seen corresponding path program 12 times [2024-06-04 15:36:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:12,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195445056] [2024-06-04 15:36:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:13,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195445056] [2024-06-04 15:36:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195445056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:13,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:13,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140771292] [2024-06-04 15:36:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:13,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:13,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 554 transitions, 9501 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:13,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:13,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:13,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:15,399 INFO L124 PetriNetUnfolderBase]: 4577/6829 cut-off events. [2024-06-04 15:36:15,399 INFO L125 PetriNetUnfolderBase]: For 670221/670223 co-relation queries the response was YES. [2024-06-04 15:36:15,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67294 conditions, 6829 events. 4577/6829 cut-off events. For 670221/670223 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37749 event pairs, 780 based on Foata normal form. 20/6848 useless extension candidates. Maximal degree in co-relation 67146. Up to 5678 conditions per place. [2024-06-04 15:36:15,490 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 421 selfloop transitions, 192 changer transitions 0/616 dead transitions. [2024-06-04 15:36:15,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 616 transitions, 11718 flow [2024-06-04 15:36:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:36:15,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-04 15:36:15,491 INFO L175 Difference]: Start difference. First operand has 311 places, 554 transitions, 9501 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:36:15,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 616 transitions, 11718 flow [2024-06-04 15:36:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 616 transitions, 11528 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:17,988 INFO L231 Difference]: Finished difference. Result has 316 places, 579 transitions, 10507 flow [2024-06-04 15:36:17,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9335, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10507, PETRI_PLACES=316, PETRI_TRANSITIONS=579} [2024-06-04 15:36:17,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-04 15:36:17,989 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 579 transitions, 10507 flow [2024-06-04 15:36:17,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:36:17,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:17,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:36:17,989 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)] === [2024-06-04 15:36:17,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1302915262, now seen corresponding path program 2 times [2024-06-04 15:36:17,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:17,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994356931] [2024-06-04 15:36:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994356931] [2024-06-04 15:36:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994356931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:19,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:19,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145470961] [2024-06-04 15:36:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:19,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:19,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 579 transitions, 10507 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:21,091 INFO L124 PetriNetUnfolderBase]: 4585/6840 cut-off events. [2024-06-04 15:36:21,092 INFO L125 PetriNetUnfolderBase]: For 653068/653068 co-relation queries the response was YES. [2024-06-04 15:36:21,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68403 conditions, 6840 events. 4585/6840 cut-off events. For 653068/653068 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37732 event pairs, 926 based on Foata normal form. 2/6841 useless extension candidates. Maximal degree in co-relation 68252. Up to 6760 conditions per place. [2024-06-04 15:36:21,202 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 564 selfloop transitions, 32 changer transitions 0/599 dead transitions. [2024-06-04 15:36:21,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 599 transitions, 11817 flow [2024-06-04 15:36:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-04 15:36:21,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:36:21,203 INFO L175 Difference]: Start difference. First operand has 316 places, 579 transitions, 10507 flow. Second operand 6 states and 100 transitions. [2024-06-04 15:36:21,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 599 transitions, 11817 flow [2024-06-04 15:36:23,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 599 transitions, 11409 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:23,313 INFO L231 Difference]: Finished difference. Result has 318 places, 581 transitions, 10243 flow [2024-06-04 15:36:23,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10099, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10243, PETRI_PLACES=318, PETRI_TRANSITIONS=581} [2024-06-04 15:36:23,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 15:36:23,314 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 581 transitions, 10243 flow [2024-06-04 15:36:23,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:23,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:36:23,314 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)] === [2024-06-04 15:36:23,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1317200062, now seen corresponding path program 3 times [2024-06-04 15:36:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446898538] [2024-06-04 15:36:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446898538] [2024-06-04 15:36:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446898538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:24,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443792216] [2024-06-04 15:36:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:24,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:24,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 581 transitions, 10243 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:24,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:24,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:26,237 INFO L124 PetriNetUnfolderBase]: 4580/6833 cut-off events. [2024-06-04 15:36:26,238 INFO L125 PetriNetUnfolderBase]: For 660281/660281 co-relation queries the response was YES. [2024-06-04 15:36:26,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67279 conditions, 6833 events. 4580/6833 cut-off events. For 660281/660281 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37700 event pairs, 943 based on Foata normal form. 2/6834 useless extension candidates. Maximal degree in co-relation 67127. Up to 6797 conditions per place. [2024-06-04 15:36:26,340 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 578 selfloop transitions, 14 changer transitions 0/595 dead transitions. [2024-06-04 15:36:26,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 595 transitions, 11529 flow [2024-06-04 15:36:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:36:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:36:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-04 15:36:26,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-04 15:36:26,341 INFO L175 Difference]: Start difference. First operand has 318 places, 581 transitions, 10243 flow. Second operand 6 states and 91 transitions. [2024-06-04 15:36:26,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 595 transitions, 11529 flow [2024-06-04 15:36:28,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 595 transitions, 11427 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:28,352 INFO L231 Difference]: Finished difference. Result has 321 places, 583 transitions, 10248 flow [2024-06-04 15:36:28,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10145, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10248, PETRI_PLACES=321, PETRI_TRANSITIONS=583} [2024-06-04 15:36:28,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-04 15:36:28,353 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 583 transitions, 10248 flow [2024-06-04 15:36:28,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:28,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:28,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:28,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:36:28,353 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)] === [2024-06-04 15:36:28,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash 903405056, now seen corresponding path program 4 times [2024-06-04 15:36:28,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:28,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835070774] [2024-06-04 15:36:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835070774] [2024-06-04 15:36:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835070774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:29,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807002224] [2024-06-04 15:36:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:29,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:29,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 583 transitions, 10248 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:29,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:29,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:29,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:31,809 INFO L124 PetriNetUnfolderBase]: 4824/7174 cut-off events. [2024-06-04 15:36:31,809 INFO L125 PetriNetUnfolderBase]: For 729603/729605 co-relation queries the response was YES. [2024-06-04 15:36:31,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71910 conditions, 7174 events. 4824/7174 cut-off events. For 729603/729605 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39593 event pairs, 834 based on Foata normal form. 14/7187 useless extension candidates. Maximal degree in co-relation 71757. Up to 6384 conditions per place. [2024-06-04 15:36:31,916 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 150 changer transitions 0/651 dead transitions. [2024-06-04 15:36:31,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 651 transitions, 12985 flow [2024-06-04 15:36:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:36:31,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:36:31,917 INFO L175 Difference]: Start difference. First operand has 321 places, 583 transitions, 10248 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:36:31,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 651 transitions, 12985 flow [2024-06-04 15:36:33,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 651 transitions, 12898 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:33,871 INFO L231 Difference]: Finished difference. Result has 330 places, 620 transitions, 11537 flow [2024-06-04 15:36:33,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10161, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11537, PETRI_PLACES=330, PETRI_TRANSITIONS=620} [2024-06-04 15:36:33,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-04 15:36:33,871 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 620 transitions, 11537 flow [2024-06-04 15:36:33,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:33,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:33,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:33,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:36:33,872 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)] === [2024-06-04 15:36:33,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 903048866, now seen corresponding path program 5 times [2024-06-04 15:36:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:33,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6317611] [2024-06-04 15:36:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:35,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6317611] [2024-06-04 15:36:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6317611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:35,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:35,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619127802] [2024-06-04 15:36:35,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:35,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:35,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:35,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 620 transitions, 11537 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:35,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:35,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:35,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:37,566 INFO L124 PetriNetUnfolderBase]: 5048/7484 cut-off events. [2024-06-04 15:36:37,566 INFO L125 PetriNetUnfolderBase]: For 825409/825411 co-relation queries the response was YES. [2024-06-04 15:36:37,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79229 conditions, 7484 events. 5048/7484 cut-off events. For 825409/825411 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41536 event pairs, 871 based on Foata normal form. 10/7493 useless extension candidates. Maximal degree in co-relation 79072. Up to 6061 conditions per place. [2024-06-04 15:36:37,667 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 460 selfloop transitions, 225 changer transitions 0/688 dead transitions. [2024-06-04 15:36:37,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 688 transitions, 14266 flow [2024-06-04 15:36:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 15:36:37,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-04 15:36:37,668 INFO L175 Difference]: Start difference. First operand has 330 places, 620 transitions, 11537 flow. Second operand 9 states and 176 transitions. [2024-06-04 15:36:37,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 688 transitions, 14266 flow [2024-06-04 15:36:40,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 688 transitions, 13638 flow, removed 268 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:40,403 INFO L231 Difference]: Finished difference. Result has 338 places, 642 transitions, 12370 flow [2024-06-04 15:36:40,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12370, PETRI_PLACES=338, PETRI_TRANSITIONS=642} [2024-06-04 15:36:40,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-04 15:36:40,403 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 642 transitions, 12370 flow [2024-06-04 15:36:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:40,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:40,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:36:40,404 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)] === [2024-06-04 15:36:40,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 903059096, now seen corresponding path program 6 times [2024-06-04 15:36:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:40,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936495333] [2024-06-04 15:36:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:41,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:41,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936495333] [2024-06-04 15:36:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936495333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:41,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:41,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901344596] [2024-06-04 15:36:41,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:41,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:41,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:41,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:41,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 642 transitions, 12370 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:41,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:41,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:41,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:43,950 INFO L124 PetriNetUnfolderBase]: 5092/7548 cut-off events. [2024-06-04 15:36:43,951 INFO L125 PetriNetUnfolderBase]: For 845849/845851 co-relation queries the response was YES. [2024-06-04 15:36:44,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80341 conditions, 7548 events. 5092/7548 cut-off events. For 845849/845851 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41816 event pairs, 904 based on Foata normal form. 14/7561 useless extension candidates. Maximal degree in co-relation 80181. Up to 6942 conditions per place. [2024-06-04 15:36:44,065 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 519 selfloop transitions, 159 changer transitions 0/681 dead transitions. [2024-06-04 15:36:44,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 681 transitions, 14303 flow [2024-06-04 15:36:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:36:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-04 15:36:44,066 INFO L175 Difference]: Start difference. First operand has 338 places, 642 transitions, 12370 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:36:44,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 681 transitions, 14303 flow [2024-06-04 15:36:48,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 681 transitions, 14021 flow, removed 112 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:48,111 INFO L231 Difference]: Finished difference. Result has 344 places, 648 transitions, 12620 flow [2024-06-04 15:36:48,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12620, PETRI_PLACES=344, PETRI_TRANSITIONS=648} [2024-06-04 15:36:48,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-04 15:36:48,111 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 648 transitions, 12620 flow [2024-06-04 15:36:48,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:48,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:48,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:36:48,112 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)] === [2024-06-04 15:36:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash 813896974, now seen corresponding path program 3 times [2024-06-04 15:36:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:48,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987796931] [2024-06-04 15:36:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987796931] [2024-06-04 15:36:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987796931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:49,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235946158] [2024-06-04 15:36:49,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:49,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:49,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:49,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 648 transitions, 12620 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:49,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:49,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:49,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:51,644 INFO L124 PetriNetUnfolderBase]: 5401/8063 cut-off events. [2024-06-04 15:36:51,644 INFO L125 PetriNetUnfolderBase]: For 1046880/1046882 co-relation queries the response was YES. [2024-06-04 15:36:51,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84237 conditions, 8063 events. 5401/8063 cut-off events. For 1046880/1046882 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45207 event pairs, 876 based on Foata normal form. 80/8142 useless extension candidates. Maximal degree in co-relation 84075. Up to 6441 conditions per place. [2024-06-04 15:36:51,767 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 504 selfloop transitions, 198 changer transitions 0/705 dead transitions. [2024-06-04 15:36:51,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 705 transitions, 14667 flow [2024-06-04 15:36:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 15:36:51,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-04 15:36:51,768 INFO L175 Difference]: Start difference. First operand has 344 places, 648 transitions, 12620 flow. Second operand 9 states and 183 transitions. [2024-06-04 15:36:51,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 705 transitions, 14667 flow [2024-06-04 15:36:55,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 705 transitions, 14040 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:55,065 INFO L231 Difference]: Finished difference. Result has 345 places, 651 transitions, 12507 flow [2024-06-04 15:36:55,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11993, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12507, PETRI_PLACES=345, PETRI_TRANSITIONS=651} [2024-06-04 15:36:55,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-04 15:36:55,066 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 651 transitions, 12507 flow [2024-06-04 15:36:55,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:55,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:55,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:55,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:36:55,067 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)] === [2024-06-04 15:36:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -123550362, now seen corresponding path program 1 times [2024-06-04 15:36:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780040440] [2024-06-04 15:36:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780040440] [2024-06-04 15:36:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780040440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:56,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475703489] [2024-06-04 15:36:56,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:56,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:56,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:56,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:56,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 651 transitions, 12507 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:56,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:56,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:56,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:58,603 INFO L124 PetriNetUnfolderBase]: 5409/8074 cut-off events. [2024-06-04 15:36:58,603 INFO L125 PetriNetUnfolderBase]: For 863476/863476 co-relation queries the response was YES. [2024-06-04 15:36:58,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84192 conditions, 8074 events. 5409/8074 cut-off events. For 863476/863476 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45388 event pairs, 1172 based on Foata normal form. 2/8075 useless extension candidates. Maximal degree in co-relation 84031. Up to 7966 conditions per place. [2024-06-04 15:36:58,713 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 637 selfloop transitions, 38 changer transitions 0/678 dead transitions. [2024-06-04 15:36:58,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 678 transitions, 14143 flow [2024-06-04 15:36:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:36:58,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-04 15:36:58,714 INFO L175 Difference]: Start difference. First operand has 345 places, 651 transitions, 12507 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:36:58,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 678 transitions, 14143 flow [2024-06-04 15:37:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 678 transitions, 13790 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:01,769 INFO L231 Difference]: Finished difference. Result has 346 places, 655 transitions, 12321 flow [2024-06-04 15:37:01,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12156, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12321, PETRI_PLACES=346, PETRI_TRANSITIONS=655} [2024-06-04 15:37:01,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-04 15:37:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 655 transitions, 12321 flow [2024-06-04 15:37:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:01,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:01,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:37:01,771 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)] === [2024-06-04 15:37:01,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1011650440, now seen corresponding path program 2 times [2024-06-04 15:37:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:01,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156548013] [2024-06-04 15:37:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:01,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156548013] [2024-06-04 15:37:02,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156548013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:02,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:02,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:02,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639217140] [2024-06-04 15:37:02,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:02,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:03,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:03,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 655 transitions, 12321 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:03,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:03,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:03,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:05,208 INFO L124 PetriNetUnfolderBase]: 5417/8086 cut-off events. [2024-06-04 15:37:05,209 INFO L125 PetriNetUnfolderBase]: For 857063/857063 co-relation queries the response was YES. [2024-06-04 15:37:05,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83483 conditions, 8086 events. 5417/8086 cut-off events. For 857063/857063 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45444 event pairs, 1217 based on Foata normal form. 2/8087 useless extension candidates. Maximal degree in co-relation 83322. Up to 8011 conditions per place. [2024-06-04 15:37:05,325 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 636 selfloop transitions, 36 changer transitions 0/675 dead transitions. [2024-06-04 15:37:05,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 675 transitions, 13753 flow [2024-06-04 15:37:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 15:37:05,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-04 15:37:05,326 INFO L175 Difference]: Start difference. First operand has 346 places, 655 transitions, 12321 flow. Second operand 8 states and 121 transitions. [2024-06-04 15:37:05,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 675 transitions, 13753 flow [2024-06-04 15:37:09,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 675 transitions, 13661 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:09,116 INFO L231 Difference]: Finished difference. Result has 351 places, 657 transitions, 12354 flow [2024-06-04 15:37:09,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12241, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12354, PETRI_PLACES=351, PETRI_TRANSITIONS=657} [2024-06-04 15:37:09,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-04 15:37:09,116 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 657 transitions, 12354 flow [2024-06-04 15:37:09,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:09,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:09,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:09,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:37:09,117 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)] === [2024-06-04 15:37:09,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1129922818, now seen corresponding path program 1 times [2024-06-04 15:37:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481794419] [2024-06-04 15:37:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481794419] [2024-06-04 15:37:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481794419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:10,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:10,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115802434] [2024-06-04 15:37:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:10,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:10,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:10,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 657 transitions, 12354 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:10,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:10,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:10,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:12,661 INFO L124 PetriNetUnfolderBase]: 5425/8098 cut-off events. [2024-06-04 15:37:12,661 INFO L125 PetriNetUnfolderBase]: For 877474/877474 co-relation queries the response was YES. [2024-06-04 15:37:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83839 conditions, 8098 events. 5425/8098 cut-off events. For 877474/877474 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45527 event pairs, 1275 based on Foata normal form. 2/8099 useless extension candidates. Maximal degree in co-relation 83675. Up to 8039 conditions per place. [2024-06-04 15:37:12,783 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 644 selfloop transitions, 30 changer transitions 0/677 dead transitions. [2024-06-04 15:37:12,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 677 transitions, 13818 flow [2024-06-04 15:37:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-04 15:37:12,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-04 15:37:12,784 INFO L175 Difference]: Start difference. First operand has 351 places, 657 transitions, 12354 flow. Second operand 8 states and 120 transitions. [2024-06-04 15:37:12,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 677 transitions, 13818 flow [2024-06-04 15:37:15,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 677 transitions, 13723 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:15,919 INFO L231 Difference]: Finished difference. Result has 354 places, 660 transitions, 12402 flow [2024-06-04 15:37:15,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12261, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12402, PETRI_PLACES=354, PETRI_TRANSITIONS=660} [2024-06-04 15:37:15,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-04 15:37:15,919 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 660 transitions, 12402 flow [2024-06-04 15:37:15,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:15,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:15,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:37:15,920 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)] === [2024-06-04 15:37:15,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 483153076, now seen corresponding path program 3 times [2024-06-04 15:37:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775515238] [2024-06-04 15:37:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:17,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:17,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775515238] [2024-06-04 15:37:17,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775515238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:17,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692063208] [2024-06-04 15:37:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:17,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:17,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:17,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 660 transitions, 12402 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:17,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:17,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:19,519 INFO L124 PetriNetUnfolderBase]: 5477/8178 cut-off events. [2024-06-04 15:37:19,520 INFO L125 PetriNetUnfolderBase]: For 940593/940593 co-relation queries the response was YES. [2024-06-04 15:37:19,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84751 conditions, 8178 events. 5477/8178 cut-off events. For 940593/940593 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46186 event pairs, 1275 based on Foata normal form. 14/8191 useless extension candidates. Maximal degree in co-relation 84585. Up to 8040 conditions per place. [2024-06-04 15:37:19,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 644 selfloop transitions, 40 changer transitions 0/687 dead transitions. [2024-06-04 15:37:19,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 687 transitions, 13968 flow [2024-06-04 15:37:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:37:19,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:37:19,644 INFO L175 Difference]: Start difference. First operand has 354 places, 660 transitions, 12402 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:37:19,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 687 transitions, 13968 flow [2024-06-04 15:37:22,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 687 transitions, 13858 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:22,549 INFO L231 Difference]: Finished difference. Result has 357 places, 663 transitions, 12445 flow [2024-06-04 15:37:22,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12292, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12445, PETRI_PLACES=357, PETRI_TRANSITIONS=663} [2024-06-04 15:37:22,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 15:37:22,550 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 663 transitions, 12445 flow [2024-06-04 15:37:22,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:22,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:22,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:37:22,550 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)] === [2024-06-04 15:37:22,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:22,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1080549286, now seen corresponding path program 4 times [2024-06-04 15:37:22,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:22,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188528365] [2024-06-04 15:37:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:22,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:23,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:23,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188528365] [2024-06-04 15:37:23,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188528365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:23,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207238908] [2024-06-04 15:37:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:23,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:23,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:23,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 663 transitions, 12445 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:26,042 INFO L124 PetriNetUnfolderBase]: 5516/8239 cut-off events. [2024-06-04 15:37:26,042 INFO L125 PetriNetUnfolderBase]: For 957742/957742 co-relation queries the response was YES. [2024-06-04 15:37:26,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85374 conditions, 8239 events. 5516/8239 cut-off events. For 957742/957742 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46614 event pairs, 1233 based on Foata normal form. 14/8252 useless extension candidates. Maximal degree in co-relation 85206. Up to 7980 conditions per place. [2024-06-04 15:37:26,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 630 selfloop transitions, 59 changer transitions 0/692 dead transitions. [2024-06-04 15:37:26,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 692 transitions, 13995 flow [2024-06-04 15:37:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:37:26,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-04 15:37:26,159 INFO L175 Difference]: Start difference. First operand has 357 places, 663 transitions, 12445 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:37:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 692 transitions, 13995 flow [2024-06-04 15:37:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 692 transitions, 13866 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:28,750 INFO L231 Difference]: Finished difference. Result has 358 places, 664 transitions, 12479 flow [2024-06-04 15:37:28,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12316, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12479, PETRI_PLACES=358, PETRI_TRANSITIONS=664} [2024-06-04 15:37:28,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-04 15:37:28,751 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 664 transitions, 12479 flow [2024-06-04 15:37:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:28,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:28,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:37:28,751 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)] === [2024-06-04 15:37:28,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1080733984, now seen corresponding path program 2 times [2024-06-04 15:37:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:28,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427895566] [2024-06-04 15:37:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427895566] [2024-06-04 15:37:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427895566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319394443] [2024-06-04 15:37:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:30,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:30,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 664 transitions, 12479 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:30,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:30,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:30,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:32,602 INFO L124 PetriNetUnfolderBase]: 5534/8265 cut-off events. [2024-06-04 15:37:32,602 INFO L125 PetriNetUnfolderBase]: For 936756/936756 co-relation queries the response was YES. [2024-06-04 15:37:32,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85977 conditions, 8265 events. 5534/8265 cut-off events. For 936756/936756 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46735 event pairs, 1294 based on Foata normal form. 2/8266 useless extension candidates. Maximal degree in co-relation 85808. Up to 8196 conditions per place. [2024-06-04 15:37:32,724 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 647 selfloop transitions, 37 changer transitions 0/687 dead transitions. [2024-06-04 15:37:32,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 687 transitions, 14065 flow [2024-06-04 15:37:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 15:37:32,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-04 15:37:32,725 INFO L175 Difference]: Start difference. First operand has 358 places, 664 transitions, 12479 flow. Second operand 7 states and 109 transitions. [2024-06-04 15:37:32,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 687 transitions, 14065 flow [2024-06-04 15:37:36,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 687 transitions, 13934 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:36,159 INFO L231 Difference]: Finished difference. Result has 360 places, 671 transitions, 12606 flow [2024-06-04 15:37:36,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12362, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12606, PETRI_PLACES=360, PETRI_TRANSITIONS=671} [2024-06-04 15:37:36,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-04 15:37:36,160 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 671 transitions, 12606 flow [2024-06-04 15:37:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:36,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:36,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:37:36,160 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)] === [2024-06-04 15:37:36,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1316909344, now seen corresponding path program 3 times [2024-06-04 15:37:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567023155] [2024-06-04 15:37:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:37,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:37,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567023155] [2024-06-04 15:37:37,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567023155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:37,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:37,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:37,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905354263] [2024-06-04 15:37:37,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:37,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:37,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:37,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 671 transitions, 12606 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:40,113 INFO L124 PetriNetUnfolderBase]: 5542/8277 cut-off events. [2024-06-04 15:37:40,114 INFO L125 PetriNetUnfolderBase]: For 923164/923164 co-relation queries the response was YES. [2024-06-04 15:37:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85731 conditions, 8277 events. 5542/8277 cut-off events. For 923164/923164 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46864 event pairs, 1282 based on Foata normal form. 2/8278 useless extension candidates. Maximal degree in co-relation 85561. Up to 8202 conditions per place. [2024-06-04 15:37:40,244 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 647 selfloop transitions, 37 changer transitions 0/687 dead transitions. [2024-06-04 15:37:40,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 687 transitions, 14076 flow [2024-06-04 15:37:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 15:37:40,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-04 15:37:40,245 INFO L175 Difference]: Start difference. First operand has 360 places, 671 transitions, 12606 flow. Second operand 6 states and 97 transitions. [2024-06-04 15:37:40,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 687 transitions, 14076 flow [2024-06-04 15:37:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 687 transitions, 13958 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:43,791 INFO L231 Difference]: Finished difference. Result has 363 places, 673 transitions, 12641 flow [2024-06-04 15:37:43,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12641, PETRI_PLACES=363, PETRI_TRANSITIONS=673} [2024-06-04 15:37:43,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-04 15:37:43,792 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 673 transitions, 12641 flow [2024-06-04 15:37:43,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:43,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:43,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:43,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:37:43,792 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)] === [2024-06-04 15:37:43,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1317206014, now seen corresponding path program 4 times [2024-06-04 15:37:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425380453] [2024-06-04 15:37:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:45,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425380453] [2024-06-04 15:37:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425380453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:45,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:45,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903710458] [2024-06-04 15:37:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:45,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:45,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 673 transitions, 12641 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:45,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:45,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:45,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:47,666 INFO L124 PetriNetUnfolderBase]: 5537/8271 cut-off events. [2024-06-04 15:37:47,667 INFO L125 PetriNetUnfolderBase]: For 909088/909090 co-relation queries the response was YES. [2024-06-04 15:37:47,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85400 conditions, 8271 events. 5537/8271 cut-off events. For 909088/909090 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46729 event pairs, 1235 based on Foata normal form. 4/8274 useless extension candidates. Maximal degree in co-relation 85229. Up to 8181 conditions per place. [2024-06-04 15:37:47,777 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 645 selfloop transitions, 38 changer transitions 0/686 dead transitions. [2024-06-04 15:37:47,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 686 transitions, 14097 flow [2024-06-04 15:37:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-04 15:37:47,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:37:47,778 INFO L175 Difference]: Start difference. First operand has 363 places, 673 transitions, 12641 flow. Second operand 6 states and 93 transitions. [2024-06-04 15:37:47,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 686 transitions, 14097 flow [2024-06-04 15:37:51,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 686 transitions, 13970 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:51,474 INFO L231 Difference]: Finished difference. Result has 365 places, 675 transitions, 12663 flow [2024-06-04 15:37:51,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12518, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12663, PETRI_PLACES=365, PETRI_TRANSITIONS=675} [2024-06-04 15:37:51,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-04 15:37:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 675 transitions, 12663 flow [2024-06-04 15:37:51,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:37:51,475 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)] === [2024-06-04 15:37:51,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash -872712445, now seen corresponding path program 1 times [2024-06-04 15:37:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687702390] [2024-06-04 15:37:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:52,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687702390] [2024-06-04 15:37:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687702390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:52,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556825055] [2024-06-04 15:37:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:52,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:52,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:52,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:52,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 675 transitions, 12663 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:37:52,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:52,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:52,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:54,788 INFO L124 PetriNetUnfolderBase]: 5550/8290 cut-off events. [2024-06-04 15:37:54,788 INFO L125 PetriNetUnfolderBase]: For 913181/913183 co-relation queries the response was YES. [2024-06-04 15:37:54,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85623 conditions, 8290 events. 5550/8290 cut-off events. For 913181/913183 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46884 event pairs, 1089 based on Foata normal form. 1/8290 useless extension candidates. Maximal degree in co-relation 85451. Up to 7435 conditions per place. [2024-06-04 15:37:54,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 540 selfloop transitions, 172 changer transitions 0/715 dead transitions. [2024-06-04 15:37:54,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 715 transitions, 14869 flow [2024-06-04 15:37:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:37:54,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:37:54,907 INFO L175 Difference]: Start difference. First operand has 365 places, 675 transitions, 12663 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:37:54,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 715 transitions, 14869 flow [2024-06-04 15:37:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 715 transitions, 14740 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:58,784 INFO L231 Difference]: Finished difference. Result has 369 places, 683 transitions, 13096 flow [2024-06-04 15:37:58,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12534, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13096, PETRI_PLACES=369, PETRI_TRANSITIONS=683} [2024-06-04 15:37:58,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-04 15:37:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 683 transitions, 13096 flow [2024-06-04 15:37:58,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:37:58,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:58,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:37:58,785 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)] === [2024-06-04 15:37:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 476860709, now seen corresponding path program 2 times [2024-06-04 15:37:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517448991] [2024-06-04 15:37:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:59,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517448991] [2024-06-04 15:37:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517448991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:59,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566327419] [2024-06-04 15:37:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:59,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:59,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 683 transitions, 13096 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:37:59,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:59,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:59,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:02,226 INFO L124 PetriNetUnfolderBase]: 5579/8330 cut-off events. [2024-06-04 15:38:02,226 INFO L125 PetriNetUnfolderBase]: For 937774/937776 co-relation queries the response was YES. [2024-06-04 15:38:02,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87036 conditions, 8330 events. 5579/8330 cut-off events. For 937774/937776 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47148 event pairs, 1097 based on Foata normal form. 1/8330 useless extension candidates. Maximal degree in co-relation 86863. Up to 7462 conditions per place. [2024-06-04 15:38:02,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 179 changer transitions 0/719 dead transitions. [2024-06-04 15:38:02,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 719 transitions, 15253 flow [2024-06-04 15:38:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:38:02,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-04 15:38:02,361 INFO L175 Difference]: Start difference. First operand has 369 places, 683 transitions, 13096 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:38:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 719 transitions, 15253 flow [2024-06-04 15:38:06,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 719 transitions, 14885 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:06,083 INFO L231 Difference]: Finished difference. Result has 373 places, 689 transitions, 13243 flow [2024-06-04 15:38:06,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12736, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13243, PETRI_PLACES=373, PETRI_TRANSITIONS=689} [2024-06-04 15:38:06,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-04 15:38:06,083 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 689 transitions, 13243 flow [2024-06-04 15:38:06,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:38:06,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:06,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:38:06,084 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:06,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 563402789, now seen corresponding path program 3 times [2024-06-04 15:38:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:06,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815368739] [2024-06-04 15:38:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815368739] [2024-06-04 15:38:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815368739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:07,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915353039] [2024-06-04 15:38:07,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:07,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:07,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:07,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 689 transitions, 13243 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:38:07,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:07,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:07,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:09,542 INFO L124 PetriNetUnfolderBase]: 5570/8318 cut-off events. [2024-06-04 15:38:09,543 INFO L125 PetriNetUnfolderBase]: For 960435/960437 co-relation queries the response was YES. [2024-06-04 15:38:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86937 conditions, 8318 events. 5570/8318 cut-off events. For 960435/960437 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47072 event pairs, 1091 based on Foata normal form. 3/8320 useless extension candidates. Maximal degree in co-relation 86763. Up to 7639 conditions per place. [2024-06-04 15:38:09,671 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 148 changer transitions 0/719 dead transitions. [2024-06-04 15:38:09,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 719 transitions, 15099 flow [2024-06-04 15:38:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:38:09,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:38:09,672 INFO L175 Difference]: Start difference. First operand has 373 places, 689 transitions, 13243 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:38:09,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 719 transitions, 15099 flow [2024-06-04 15:38:14,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 719 transitions, 14751 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:14,157 INFO L231 Difference]: Finished difference. Result has 377 places, 689 transitions, 13199 flow [2024-06-04 15:38:14,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12895, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13199, PETRI_PLACES=377, PETRI_TRANSITIONS=689} [2024-06-04 15:38:14,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-04 15:38:14,158 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 689 transitions, 13199 flow [2024-06-04 15:38:14,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:38:14,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:14,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:38:14,158 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:14,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -867259700, now seen corresponding path program 1 times [2024-06-04 15:38:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241111655] [2024-06-04 15:38:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:14,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:15,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:15,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241111655] [2024-06-04 15:38:15,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241111655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:15,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:15,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281620733] [2024-06-04 15:38:15,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:15,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:15,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 689 transitions, 13199 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:15,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:15,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:18,699 INFO L124 PetriNetUnfolderBase]: 6178/9266 cut-off events. [2024-06-04 15:38:18,699 INFO L125 PetriNetUnfolderBase]: For 1385293/1385295 co-relation queries the response was YES. [2024-06-04 15:38:18,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99818 conditions, 9266 events. 6178/9266 cut-off events. For 1385293/1385295 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 53155 event pairs, 899 based on Foata normal form. 56/9321 useless extension candidates. Maximal degree in co-relation 99643. Up to 4902 conditions per place. [2024-06-04 15:38:18,823 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 405 selfloop transitions, 351 changer transitions 13/772 dead transitions. [2024-06-04 15:38:18,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 772 transitions, 16371 flow [2024-06-04 15:38:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 15:38:18,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-04 15:38:18,824 INFO L175 Difference]: Start difference. First operand has 377 places, 689 transitions, 13199 flow. Second operand 10 states and 203 transitions. [2024-06-04 15:38:18,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 772 transitions, 16371 flow [2024-06-04 15:38:23,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 772 transitions, 16080 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:23,787 INFO L231 Difference]: Finished difference. Result has 387 places, 701 transitions, 14562 flow [2024-06-04 15:38:23,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14562, PETRI_PLACES=387, PETRI_TRANSITIONS=701} [2024-06-04 15:38:23,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-04 15:38:23,788 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 701 transitions, 14562 flow [2024-06-04 15:38:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:23,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:23,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:38:23,791 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:23,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash -866990930, now seen corresponding path program 2 times [2024-06-04 15:38:23,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:23,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079630684] [2024-06-04 15:38:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:23,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:25,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:25,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079630684] [2024-06-04 15:38:25,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079630684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:25,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:25,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957577012] [2024-06-04 15:38:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:25,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:25,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 701 transitions, 14562 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:25,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:25,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:25,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:28,479 INFO L124 PetriNetUnfolderBase]: 6201/9323 cut-off events. [2024-06-04 15:38:28,479 INFO L125 PetriNetUnfolderBase]: For 1487458/1487460 co-relation queries the response was YES. [2024-06-04 15:38:28,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105771 conditions, 9323 events. 6201/9323 cut-off events. For 1487458/1487460 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 53675 event pairs, 1155 based on Foata normal form. 68/9390 useless extension candidates. Maximal degree in co-relation 105591. Up to 6596 conditions per place. [2024-06-04 15:38:28,634 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 416 selfloop transitions, 341 changer transitions 0/760 dead transitions. [2024-06-04 15:38:28,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 760 transitions, 17194 flow [2024-06-04 15:38:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 15:38:28,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-04 15:38:28,635 INFO L175 Difference]: Start difference. First operand has 387 places, 701 transitions, 14562 flow. Second operand 10 states and 194 transitions. [2024-06-04 15:38:28,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 760 transitions, 17194 flow [2024-06-04 15:38:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 760 transitions, 16981 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:34,827 INFO L231 Difference]: Finished difference. Result has 395 places, 706 transitions, 15247 flow [2024-06-04 15:38:34,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14375, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15247, PETRI_PLACES=395, PETRI_TRANSITIONS=706} [2024-06-04 15:38:34,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-04 15:38:34,828 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 706 transitions, 15247 flow [2024-06-04 15:38:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:34,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:34,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:38:34,828 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:34,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash -867000230, now seen corresponding path program 3 times [2024-06-04 15:38:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113523619] [2024-06-04 15:38:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113523619] [2024-06-04 15:38:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113523619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065620805] [2024-06-04 15:38:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:37,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:37,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 706 transitions, 15247 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:37,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:37,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:40,315 INFO L124 PetriNetUnfolderBase]: 6257/9410 cut-off events. [2024-06-04 15:38:40,315 INFO L125 PetriNetUnfolderBase]: For 1380569/1380571 co-relation queries the response was YES. [2024-06-04 15:38:40,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108146 conditions, 9410 events. 6257/9410 cut-off events. For 1380569/1380571 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54549 event pairs, 1511 based on Foata normal form. 18/9427 useless extension candidates. Maximal degree in co-relation 107963. Up to 8882 conditions per place. [2024-06-04 15:38:40,474 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 647 selfloop transitions, 104 changer transitions 0/754 dead transitions. [2024-06-04 15:38:40,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 754 transitions, 17073 flow [2024-06-04 15:38:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:38:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:38:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-04 15:38:40,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-04 15:38:40,475 INFO L175 Difference]: Start difference. First operand has 395 places, 706 transitions, 15247 flow. Second operand 11 states and 190 transitions. [2024-06-04 15:38:40,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 754 transitions, 17073 flow [2024-06-04 15:38:46,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 754 transitions, 16452 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:46,793 INFO L231 Difference]: Finished difference. Result has 399 places, 708 transitions, 14923 flow [2024-06-04 15:38:46,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14626, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14923, PETRI_PLACES=399, PETRI_TRANSITIONS=708} [2024-06-04 15:38:46,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 15:38:46,793 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 708 transitions, 14923 flow [2024-06-04 15:38:46,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:46,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:46,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:46,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:38:46,794 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:46,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash 740711164, now seen corresponding path program 4 times [2024-06-04 15:38:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:46,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243612304] [2024-06-04 15:38:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243612304] [2024-06-04 15:38:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243612304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:48,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:48,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651933602] [2024-06-04 15:38:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:48,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:48,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 708 transitions, 14923 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:38:48,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:48,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:48,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:52,501 INFO L124 PetriNetUnfolderBase]: 7132/10767 cut-off events. [2024-06-04 15:38:52,502 INFO L125 PetriNetUnfolderBase]: For 1866377/1866379 co-relation queries the response was YES. [2024-06-04 15:38:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125337 conditions, 10767 events. 7132/10767 cut-off events. For 1866377/1866379 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 63993 event pairs, 1603 based on Foata normal form. 58/10824 useless extension candidates. Maximal degree in co-relation 125154. Up to 9095 conditions per place. [2024-06-04 15:38:52,674 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 635 selfloop transitions, 151 changer transitions 0/789 dead transitions. [2024-06-04 15:38:52,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 789 transitions, 18131 flow [2024-06-04 15:38:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:38:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:38:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-04 15:38:52,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43458980044345896 [2024-06-04 15:38:52,675 INFO L175 Difference]: Start difference. First operand has 399 places, 708 transitions, 14923 flow. Second operand 11 states and 196 transitions. [2024-06-04 15:38:52,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 789 transitions, 18131 flow [2024-06-04 15:39:00,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 789 transitions, 17892 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:00,534 INFO L231 Difference]: Finished difference. Result has 405 places, 734 transitions, 15815 flow [2024-06-04 15:39:00,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14684, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15815, PETRI_PLACES=405, PETRI_TRANSITIONS=734} [2024-06-04 15:39:00,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-04 15:39:00,535 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 734 transitions, 15815 flow [2024-06-04 15:39:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:39:00,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:00,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:00,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:39:00,535 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 740720464, now seen corresponding path program 5 times [2024-06-04 15:39:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:00,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469191906] [2024-06-04 15:39:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:02,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469191906] [2024-06-04 15:39:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469191906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:02,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:02,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:39:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296100146] [2024-06-04 15:39:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:39:02,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:39:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:39:02,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:02,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 734 transitions, 15815 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:39:02,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:02,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:02,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:05,805 INFO L124 PetriNetUnfolderBase]: 7302/11061 cut-off events. [2024-06-04 15:39:05,805 INFO L125 PetriNetUnfolderBase]: For 1893393/1893395 co-relation queries the response was YES. [2024-06-04 15:39:06,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126639 conditions, 11061 events. 7302/11061 cut-off events. For 1893393/1893395 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 66404 event pairs, 1831 based on Foata normal form. 70/11130 useless extension candidates. Maximal degree in co-relation 126452. Up to 10031 conditions per place. [2024-06-04 15:39:06,327 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 634 selfloop transitions, 148 changer transitions 0/785 dead transitions. [2024-06-04 15:39:06,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 785 transitions, 18125 flow [2024-06-04 15:39:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:39:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:39:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-04 15:39:06,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-04 15:39:06,341 INFO L175 Difference]: Start difference. First operand has 405 places, 734 transitions, 15815 flow. Second operand 11 states and 192 transitions. [2024-06-04 15:39:06,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 785 transitions, 18125 flow [2024-06-04 15:39:13,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 785 transitions, 17815 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-04 15:39:13,765 INFO L231 Difference]: Finished difference. Result has 412 places, 738 transitions, 15973 flow [2024-06-04 15:39:13,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15525, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15973, PETRI_PLACES=412, PETRI_TRANSITIONS=738} [2024-06-04 15:39:13,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-04 15:39:13,766 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 738 transitions, 15973 flow [2024-06-04 15:39:13,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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) [2024-06-04 15:39:13,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:13,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:39:13,767 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:13,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1195347678, now seen corresponding path program 1 times [2024-06-04 15:39:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:13,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699638689] [2024-06-04 15:39:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699638689] [2024-06-04 15:39:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699638689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:14,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054256758] [2024-06-04 15:39:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:14,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 738 transitions, 15973 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:14,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:18,760 INFO L124 PetriNetUnfolderBase]: 7354/11134 cut-off events. [2024-06-04 15:39:18,760 INFO L125 PetriNetUnfolderBase]: For 1744107/1744109 co-relation queries the response was YES. [2024-06-04 15:39:18,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128760 conditions, 11134 events. 7354/11134 cut-off events. For 1744107/1744109 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 67126 event pairs, 1781 based on Foata normal form. 4/11137 useless extension candidates. Maximal degree in co-relation 128569. Up to 10093 conditions per place. [2024-06-04 15:39:18,928 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 230 changer transitions 0/784 dead transitions. [2024-06-04 15:39:18,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 784 transitions, 18550 flow [2024-06-04 15:39:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:39:18,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:39:18,929 INFO L175 Difference]: Start difference. First operand has 412 places, 738 transitions, 15973 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:39:18,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 784 transitions, 18550 flow [2024-06-04 15:39:26,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 784 transitions, 18162 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-04 15:39:26,358 INFO L231 Difference]: Finished difference. Result has 413 places, 751 transitions, 16583 flow [2024-06-04 15:39:26,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15593, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16583, PETRI_PLACES=413, PETRI_TRANSITIONS=751} [2024-06-04 15:39:26,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-04 15:39:26,359 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 751 transitions, 16583 flow [2024-06-04 15:39:26,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:26,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:26,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:39:26,359 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:26,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1501450326, now seen corresponding path program 2 times [2024-06-04 15:39:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216877352] [2024-06-04 15:39:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:27,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:27,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216877352] [2024-06-04 15:39:27,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216877352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:27,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:27,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:27,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189045220] [2024-06-04 15:39:27,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:27,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:27,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:27,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:27,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 751 transitions, 16583 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:27,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:31,412 INFO L124 PetriNetUnfolderBase]: 7396/11192 cut-off events. [2024-06-04 15:39:31,412 INFO L125 PetriNetUnfolderBase]: For 1759925/1759927 co-relation queries the response was YES. [2024-06-04 15:39:31,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130128 conditions, 11192 events. 7396/11192 cut-off events. For 1759925/1759927 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67471 event pairs, 1765 based on Foata normal form. 2/11193 useless extension candidates. Maximal degree in co-relation 129935. Up to 10117 conditions per place. [2024-06-04 15:39:31,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 233 changer transitions 0/790 dead transitions. [2024-06-04 15:39:31,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 790 transitions, 19096 flow [2024-06-04 15:39:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:39:31,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:39:31,588 INFO L175 Difference]: Start difference. First operand has 413 places, 751 transitions, 16583 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:39:31,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 790 transitions, 19096 flow [2024-06-04 15:39:39,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 790 transitions, 18465 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:39,139 INFO L231 Difference]: Finished difference. Result has 417 places, 760 transitions, 16778 flow [2024-06-04 15:39:39,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15968, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16778, PETRI_PLACES=417, PETRI_TRANSITIONS=760} [2024-06-04 15:39:39,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-04 15:39:39,140 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 760 transitions, 16778 flow [2024-06-04 15:39:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:39,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:39,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:39,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:39:39,141 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:39,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1506692736, now seen corresponding path program 3 times [2024-06-04 15:39:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:39,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124898897] [2024-06-04 15:39:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:39,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:40,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124898897] [2024-06-04 15:39:40,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124898897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:40,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:40,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:40,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925645652] [2024-06-04 15:39:40,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:40,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:40,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:40,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:40,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:40,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 760 transitions, 16778 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:40,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:40,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:40,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:44,022 INFO L124 PetriNetUnfolderBase]: 7400/11197 cut-off events. [2024-06-04 15:39:44,022 INFO L125 PetriNetUnfolderBase]: For 1811087/1811089 co-relation queries the response was YES. [2024-06-04 15:39:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129937 conditions, 11197 events. 7400/11197 cut-off events. For 1811087/1811089 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 67453 event pairs, 2047 based on Foata normal form. 14/11210 useless extension candidates. Maximal degree in co-relation 129742. Up to 10870 conditions per place. [2024-06-04 15:39:44,200 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 713 selfloop transitions, 83 changer transitions 0/799 dead transitions. [2024-06-04 15:39:44,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 799 transitions, 18837 flow [2024-06-04 15:39:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:39:44,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-04 15:39:44,201 INFO L175 Difference]: Start difference. First operand has 417 places, 760 transitions, 16778 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:39:44,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 799 transitions, 18837 flow [2024-06-04 15:39:51,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 799 transitions, 18437 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:51,362 INFO L231 Difference]: Finished difference. Result has 422 places, 767 transitions, 16763 flow [2024-06-04 15:39:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16386, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16763, PETRI_PLACES=422, PETRI_TRANSITIONS=767} [2024-06-04 15:39:51,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-04 15:39:51,362 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 767 transitions, 16763 flow [2024-06-04 15:39:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:51,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:51,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:39:51,385 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:39:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 848654582, now seen corresponding path program 4 times [2024-06-04 15:39:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:51,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299856156] [2024-06-04 15:39:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:51,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:52,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:52,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299856156] [2024-06-04 15:39:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299856156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:52,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:52,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120805200] [2024-06-04 15:39:52,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:52,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 767 transitions, 16763 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:39:52,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:52,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:52,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:56,261 INFO L124 PetriNetUnfolderBase]: 7394/11190 cut-off events. [2024-06-04 15:39:56,261 INFO L125 PetriNetUnfolderBase]: For 1787479/1787481 co-relation queries the response was YES. [2024-06-04 15:39:56,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129486 conditions, 11190 events. 7394/11190 cut-off events. For 1787479/1787481 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67455 event pairs, 1819 based on Foata normal form. 2/11191 useless extension candidates. Maximal degree in co-relation 129290. Up to 10121 conditions per place. [2024-06-04 15:39:56,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 235 changer transitions 0/794 dead transitions. [2024-06-04 15:39:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 794 transitions, 18820 flow [2024-06-04 15:39:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:39:56,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:39:56,430 INFO L175 Difference]: Start difference. First operand has 422 places, 767 transitions, 16763 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:39:56,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 794 transitions, 18820 flow [2024-06-04 15:40:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 794 transitions, 18494 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:02,258 INFO L231 Difference]: Finished difference. Result has 424 places, 768 transitions, 16955 flow [2024-06-04 15:40:02,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16437, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16955, PETRI_PLACES=424, PETRI_TRANSITIONS=768} [2024-06-04 15:40:02,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-04 15:40:02,258 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 768 transitions, 16955 flow [2024-06-04 15:40:02,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:40:02,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:02,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:02,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:40:02,259 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:02,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1501151424, now seen corresponding path program 1 times [2024-06-04 15:40:02,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:02,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631854616] [2024-06-04 15:40:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:03,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:03,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631854616] [2024-06-04 15:40:03,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631854616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:03,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762843940] [2024-06-04 15:40:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:03,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:03,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:03,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 768 transitions, 16955 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:07,798 INFO L124 PetriNetUnfolderBase]: 7614/11494 cut-off events. [2024-06-04 15:40:07,799 INFO L125 PetriNetUnfolderBase]: For 1966119/1966121 co-relation queries the response was YES. [2024-06-04 15:40:07,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135576 conditions, 11494 events. 7614/11494 cut-off events. For 1966119/1966121 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 69133 event pairs, 1597 based on Foata normal form. 12/11505 useless extension candidates. Maximal degree in co-relation 135379. Up to 8047 conditions per place. [2024-06-04 15:40:07,976 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 419 selfloop transitions, 410 changer transitions 0/832 dead transitions. [2024-06-04 15:40:07,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 832 transitions, 20228 flow [2024-06-04 15:40:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:40:07,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-04 15:40:07,977 INFO L175 Difference]: Start difference. First operand has 424 places, 768 transitions, 16955 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:40:07,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 832 transitions, 20228 flow [2024-06-04 15:40:18,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 832 transitions, 19803 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:18,081 INFO L231 Difference]: Finished difference. Result has 430 places, 794 transitions, 18532 flow [2024-06-04 15:40:18,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16530, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18532, PETRI_PLACES=430, PETRI_TRANSITIONS=794} [2024-06-04 15:40:18,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-04 15:40:18,082 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 794 transitions, 18532 flow [2024-06-04 15:40:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:18,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:18,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:18,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:40:18,082 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:18,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1497432354, now seen corresponding path program 2 times [2024-06-04 15:40:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758579192] [2024-06-04 15:40:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:19,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758579192] [2024-06-04 15:40:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758579192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:19,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:19,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077906757] [2024-06-04 15:40:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:19,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:19,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:19,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:19,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 794 transitions, 18532 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:19,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:19,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:23,689 INFO L124 PetriNetUnfolderBase]: 7754/11687 cut-off events. [2024-06-04 15:40:23,689 INFO L125 PetriNetUnfolderBase]: For 2086817/2086819 co-relation queries the response was YES. [2024-06-04 15:40:23,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142543 conditions, 11687 events. 7754/11687 cut-off events. For 2086817/2086819 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70367 event pairs, 2060 based on Foata normal form. 14/11700 useless extension candidates. Maximal degree in co-relation 142343. Up to 11224 conditions per place. [2024-06-04 15:40:23,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 747 selfloop transitions, 92 changer transitions 0/842 dead transitions. [2024-06-04 15:40:23,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 842 transitions, 21270 flow [2024-06-04 15:40:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-04 15:40:23,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-04 15:40:23,871 INFO L175 Difference]: Start difference. First operand has 430 places, 794 transitions, 18532 flow. Second operand 10 states and 169 transitions. [2024-06-04 15:40:23,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 842 transitions, 21270 flow [2024-06-04 15:40:32,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 842 transitions, 20793 flow, removed 213 selfloop flow, removed 2 redundant places. [2024-06-04 15:40:32,177 INFO L231 Difference]: Finished difference. Result has 439 places, 808 transitions, 18854 flow [2024-06-04 15:40:32,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18147, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18854, PETRI_PLACES=439, PETRI_TRANSITIONS=808} [2024-06-04 15:40:32,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-04 15:40:32,178 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 808 transitions, 18854 flow [2024-06-04 15:40:32,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:32,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:32,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:32,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:40:32,179 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:32,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:32,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1497438306, now seen corresponding path program 5 times [2024-06-04 15:40:32,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:32,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746375756] [2024-06-04 15:40:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746375756] [2024-06-04 15:40:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746375756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:33,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:33,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241631348] [2024-06-04 15:40:33,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:33,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:33,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 808 transitions, 18854 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:40:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:33,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:33,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:37,295 INFO L124 PetriNetUnfolderBase]: 7730/11655 cut-off events. [2024-06-04 15:40:37,295 INFO L125 PetriNetUnfolderBase]: For 2065427/2065429 co-relation queries the response was YES. [2024-06-04 15:40:37,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139409 conditions, 11655 events. 7730/11655 cut-off events. For 2065427/2065429 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70166 event pairs, 2050 based on Foata normal form. 18/11672 useless extension candidates. Maximal degree in co-relation 139206. Up to 10809 conditions per place. [2024-06-04 15:40:37,511 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 669 selfloop transitions, 168 changer transitions 0/840 dead transitions. [2024-06-04 15:40:37,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 840 transitions, 21079 flow [2024-06-04 15:40:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:40:37,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-04 15:40:37,512 INFO L175 Difference]: Start difference. First operand has 439 places, 808 transitions, 18854 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:40:37,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 840 transitions, 21079 flow [2024-06-04 15:40:45,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 840 transitions, 20753 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-04 15:40:45,224 INFO L231 Difference]: Finished difference. Result has 445 places, 811 transitions, 18974 flow [2024-06-04 15:40:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18528, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18974, PETRI_PLACES=445, PETRI_TRANSITIONS=811} [2024-06-04 15:40:45,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-04 15:40:45,224 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 811 transitions, 18974 flow [2024-06-04 15:40:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:40:45,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:45,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:40:45,225 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:45,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash -148009302, now seen corresponding path program 6 times [2024-06-04 15:40:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447840662] [2024-06-04 15:40:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:46,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447840662] [2024-06-04 15:40:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447840662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:46,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:46,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976633399] [2024-06-04 15:40:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:46,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:46,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:46,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:46,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 811 transitions, 18974 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:40:46,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:46,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:46,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:50,204 INFO L124 PetriNetUnfolderBase]: 7704/11619 cut-off events. [2024-06-04 15:40:50,204 INFO L125 PetriNetUnfolderBase]: For 2028589/2028591 co-relation queries the response was YES. [2024-06-04 15:40:50,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138697 conditions, 11619 events. 7704/11619 cut-off events. For 2028589/2028591 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 70000 event pairs, 2027 based on Foata normal form. 8/11626 useless extension candidates. Maximal degree in co-relation 138492. Up to 10794 conditions per place. [2024-06-04 15:40:50,386 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 664 selfloop transitions, 170 changer transitions 0/837 dead transitions. [2024-06-04 15:40:50,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 837 transitions, 20916 flow [2024-06-04 15:40:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:40:50,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-04 15:40:50,387 INFO L175 Difference]: Start difference. First operand has 445 places, 811 transitions, 18974 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:40:50,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 837 transitions, 20916 flow [2024-06-04 15:40:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 837 transitions, 20184 flow, removed 140 selfloop flow, removed 10 redundant places. [2024-06-04 15:40:57,826 INFO L231 Difference]: Finished difference. Result has 444 places, 811 transitions, 18596 flow [2024-06-04 15:40:57,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18242, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18596, PETRI_PLACES=444, PETRI_TRANSITIONS=811} [2024-06-04 15:40:57,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-04 15:40:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 811 transitions, 18596 flow [2024-06-04 15:40:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:40:57,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:57,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:57,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:40:57,827 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:40:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1048100894, now seen corresponding path program 3 times [2024-06-04 15:40:57,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:57,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549957088] [2024-06-04 15:40:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:57,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:59,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549957088] [2024-06-04 15:40:59,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549957088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:59,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:59,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309867664] [2024-06-04 15:40:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:59,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:59,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 811 transitions, 18596 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:59,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:59,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:59,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand